Vulnerability-Lookup

RHSA-2026:67571

Vulnerability from csaf_redhat - Published: 2026-09-15 14:05 - Updated: 2026-10-03 10:03

Summary

Red Hat Security Advisory: Red Hat Web Terminal Operator 1.13.1 release.

Severity

Important

Notes

Topic: Red Hat Web Terminal Operator 1.13.1 has been released.

Details: The Web Terminal provides a way to access a fully in-browser terminal emulator within the OpenShift Console. Command-line tools for interacting with the OpenShift cluster are pre-installed.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-33818

A flaw was found in the `encoding/asn1` package in Go. An attacker could provide a specially crafted, deeply-nested Abstract Syntax Notation One (ASN.1) structure, leading to excessive recursion during the `Unmarshal` operation. This could result in stack exhaustion and a Denial of Service (DoS) condition.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-776 - Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

Affected products

Fixed 1 product

Product	Identifier	Version	Remediation
Unresolved product id: Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:9183850d0dcd63f2797c95efbdb9d2cb2819297da3a6263ab3a6bd8ca87f1dac_amd64		—	Vendor Fix fix

Known not affected 3 products

Product	Identifier	Version	Remediation
Unresolved product id: Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:971144ce45abdc4a000822ea97e814612a12c89c53d834bdab5b09b3ee317c7e_amd64		—
Unresolved product id: Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:764c61d2ba2856753a704bf143bb081002710b11631cd5d7c91a9363208d194f_amd64		—
Unresolved product id: Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:92404f6ee24cb58305e9c6d44f290cd6a82cdc57dfc1854854a21bab32da560f_amd64		—

Threats

Impact Important

CVE-2026-56853

A flaw was found in the `net/http` component of the Go standard library. When a server is configured to support unencrypted HTTP/2, it reads initial bytes from new connections to detect the HTTP/2 client preface. However, the `ReadHeaderTimeout` is not correctly applied during this process. This oversight could allow a remote attacker to maintain open connections indefinitely, potentially leading to a Denial of Service (DoS) by exhausting server resources.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-770 - Allocation of Resources Without Limits or Throttling

Affected products

Fixed 1 product, the same list as for CVE-2026-33818

Known not affected 3 products, the same list as for CVE-2026-33818

Threats

Impact Important

CVE-2026-56859

A flaw was found in the `encoding/xml` package of Go. The `DecodeElement` function failed to correctly track recursion depth, which could lead to stack exhaustion. A remote attacker could exploit this vulnerability by providing a specially crafted XML input, resulting in a Denial of Service (DoS) for the affected application.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-776 - Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

Affected products

Fixed 1 product, the same list as for CVE-2026-33818

Known not affected 3 products, the same list as for CVE-2026-33818

Threats

Impact Important

CVE-2026-56860

A flaw was found in `net/url`, a component of `golang`. This vulnerability arises when resolving relative paths that contain numerous parent directory ('..') segments. A remote attacker could exploit this by providing a specially crafted path, leading to quadratic time complexity and excessive memory allocation. This can result in a Denial of Service (DoS) due to resource exhaustion.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-770 - Allocation of Resources Without Limits or Throttling

Affected products

Fixed 1 product, the same list as for CVE-2026-33818

Known not affected 3 products, the same list as for CVE-2026-33818

Threats

Impact Important

CVE-2026-56862

A flaw was found in the `crypto/tls` package, part of `golang`. A malicious client can exploit this vulnerability by continuously sending KeyUpdate messages to a server. This forces the server to perform indefinite key derivation operations, leading to resource exhaustion and a Denial of Service (DoS) condition.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-1050 - Excessive Platform Resource Consumption within a Loop

Affected products

Fixed 1 product, the same list as for CVE-2026-33818

Known not affected 3 products, the same list as for CVE-2026-33818

Threats

Impact Important

References

49 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:67571	self
https://access.redhat.com/security/cve/CVE-2026-33818	external
https://access.redhat.com/security/cve/CVE-2026-56853	external
https://access.redhat.com/security/cve/CVE-2026-56859	external
https://access.redhat.com/security/cve/CVE-2026-56860	external
https://access.redhat.com/security/cve/CVE-2026-56862	external
https://access.redhat.com/security/updates/classi…	external
https://redhat.atlassian.net/browse/WTO-519	external
https://redhat.atlassian.net/browse/WTO-527	external
https://redhat.atlassian.net/browse/WTO-533	external
https://redhat.atlassian.net/browse/WTO-541	external
https://redhat.atlassian.net/browse/WTO-547	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-33818	self
https://bugzilla.redhat.com/show_bug.cgi?id=2515815	external
https://www.cve.org/CVERecord?id=CVE-2026-33818	external
https://nvd.nist.gov/vuln/detail/CVE-2026-33818	external
https://go.dev/cl/814980	external
https://go.dev/issue/80405	external
https://groups.google.com/g/golang-announce/c/94p…	external
https://pkg.go.dev/vuln/GO-2026-5972	external
https://access.redhat.com/security/cve/CVE-2026-56853	self
https://bugzilla.redhat.com/show_bug.cgi?id=2515827	external
https://www.cve.org/CVERecord?id=CVE-2026-56853	external
https://nvd.nist.gov/vuln/detail/CVE-2026-56853	external
https://go.dev/cl/795540	external
https://go.dev/issue/80205	external
https://pkg.go.dev/vuln/GO-2026-6089	external
https://access.redhat.com/security/cve/CVE-2026-56859	self
https://bugzilla.redhat.com/show_bug.cgi?id=2515840	external
https://www.cve.org/CVERecord?id=CVE-2026-56859	external
https://nvd.nist.gov/vuln/detail/CVE-2026-56859	external
https://go.dev/cl/803320	external
https://go.dev/issue/80481	external
https://pkg.go.dev/vuln/GO-2026-6088	external
https://access.redhat.com/security/cve/CVE-2026-56860	self
https://bugzilla.redhat.com/show_bug.cgi?id=2515820	external
https://www.cve.org/CVERecord?id=CVE-2026-56860	external
https://nvd.nist.gov/vuln/detail/CVE-2026-56860	external
https://go.dev/cl/803681	external
https://go.dev/issue/80494	external
https://pkg.go.dev/vuln/GO-2026-6218	external
https://access.redhat.com/security/cve/CVE-2026-56862	self
https://bugzilla.redhat.com/show_bug.cgi?id=2515839	external
https://www.cve.org/CVERecord?id=CVE-2026-56862	external
https://nvd.nist.gov/vuln/detail/CVE-2026-56862	external
https://go.dev/cl/804261	external
https://go.dev/issue/80528	external
https://pkg.go.dev/vuln/GO-2026-6090	external

JSON

To clipboard

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  "vulnerabilities": [
    {
      "cve": "CVE-2026-33818",
      "cwe": {
        "id": "CWE-776",
        "name": "Improper Restriction of Recursive Entity References in DTDs (\u0027XML Entity Expansion\u0027)"
      },
      "discovery_date": "2026-08-13T22:12:37.151735+00:00",
      "flags": [
        {
          "label": "vulnerable_code_not_present",
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            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:764c61d2ba2856753a704bf143bb081002710b11631cd5d7c91a9363208d194f_amd64",
            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:92404f6ee24cb58305e9c6d44f290cd6a82cdc57dfc1854854a21bab32da560f_amd64"
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      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2515815"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the `encoding/asn1` package in Go. An attacker could provide a specially crafted, deeply-nested Abstract Syntax Notation One (ASN.1) structure, leading to excessive recursion during the `Unmarshal` operation. This could result in stack exhaustion and a Denial of Service (DoS) condition.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important denial of service flaw in the Go encoding/asn1 package, as it can be triggered remotely without authentication. An attacker can provide a malformed ASN.1 structure, causing excessive recursion during unmarshalling and leading to stack exhaustion, which can render the service unavailable.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-33818"
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          "summary": "RHBZ#2515815",
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        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-33818",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-33818"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-33818",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33818"
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        {
          "category": "external",
          "summary": "https://go.dev/cl/814980",
          "url": "https://go.dev/cl/814980"
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          "url": "https://go.dev/issue/80405"
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          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-5972",
          "url": "https://pkg.go.dev/vuln/GO-2026-5972"
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        {
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            "attackComplexity": "LOW",
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            "baseScore": 7.5,
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            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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    },
    {
      "cve": "CVE-2026-56853",
      "cwe": {
        "id": "CWE-770",
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          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Important: Unencrypted HTTP/2 servers are susceptible to a denial of service due to improper handling of ReadHeaderTimeout during the client preface reading phase. This can lead to resource exhaustion and service unavailability in affected Red Hat products configured to support unencrypted HTTP/2.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56853"
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          "category": "external",
          "summary": "https://go.dev/cl/795540",
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          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-6089",
          "url": "https://pkg.go.dev/vuln/GO-2026-6089"
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            "attackComplexity": "LOW",
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            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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    },
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      "cve": "CVE-2026-56859",
      "cwe": {
        "id": "CWE-776",
        "name": "Improper Restriction of Recursive Entity References in DTDs (\u0027XML Entity Expansion\u0027)"
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          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "encoding/xml: golang: Go: Denial of Service via XML decoding recursion depth issue",
          "title": "Vulnerability summary"
        },
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          "category": "other",
          "text": "An Important denial of service flaw affects applications utilizing the Go `encoding/xml` package. This vulnerability arises from an issue in XML decoding where a recursion depth counter fails to reset, potentially leading to stack exhaustion when processing malicious XML input.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
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    {
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        {
          "category": "description",
          "text": "A flaw was found in `net/url`, a component of `golang`. This vulnerability arises when resolving relative paths that contain numerous parent directory (\u0027..\u0027) segments. A remote attacker could exploit this by providing a specially crafted path, leading to quadratic time complexity and excessive memory allocation. This can result in a Denial of Service (DoS) due to resource exhaustion.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important denial of service flaw in the Go `net/url` package. Applications built with Go that process untrusted URLs containing parent directory segments (\u0027..\u0027) may be vulnerable to excessive resource consumption due to quadratic time complexity in path resolution. This can lead to a denial of service, impacting the availability of affected services.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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          "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:764c61d2ba2856753a704bf143bb081002710b11631cd5d7c91a9363208d194f_amd64",
          "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:92404f6ee24cb58305e9c6d44f290cd6a82cdc57dfc1854854a21bab32da560f_amd64"
        ]
      },
      "references": [
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          "category": "self",
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        {
          "category": "external",
          "summary": "RHBZ#2515820",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2515820"
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        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-56860",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-56860"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-56860",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56860"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/803681",
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          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/94pEornpRlI",
          "url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-6218",
          "url": "https://pkg.go.dev/vuln/GO-2026-6218"
        }
      ],
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          "category": "vendor_fix",
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            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:9183850d0dcd63f2797c95efbdb9d2cb2819297da3a6263ab3a6bd8ca87f1dac_amd64"
          ],
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            "category": "none"
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            "baseSeverity": "HIGH",
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            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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            "version": "3.1"
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            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:971144ce45abdc4a000822ea97e814612a12c89c53d834bdab5b09b3ee317c7e_amd64",
            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:764c61d2ba2856753a704bf143bb081002710b11631cd5d7c91a9363208d194f_amd64",
            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:92404f6ee24cb58305e9c6d44f290cd6a82cdc57dfc1854854a21bab32da560f_amd64"
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          "details": "Important"
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      "title": "net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution"
    },
    {
      "cve": "CVE-2026-56862",
      "cwe": {
        "id": "CWE-1050",
        "name": "Excessive Platform Resource Consumption within a Loop"
      },
      "discovery_date": "2026-08-13T22:16:41.928450+00:00",
      "flags": [
        {
          "label": "vulnerable_code_not_present",
          "product_ids": [
            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:971144ce45abdc4a000822ea97e814612a12c89c53d834bdab5b09b3ee317c7e_amd64",
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2515839"
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          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important denial of service vulnerability in the `golang` `crypto/tls` package. A remote, unauthenticated attacker can exploit this flaw by continuously sending `KeyUpdate` messages during a TLS handshake, forcing the server to perform indefinite key derivation operations. This resource exhaustion can lead to a denial of service for applications and services in Red Hat products that use the affected `crypto/tls` library and are exposed to untrusted network clients.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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        ],
        "known_not_affected": [
          "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:971144ce45abdc4a000822ea97e814612a12c89c53d834bdab5b09b3ee317c7e_amd64",
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          "category": "self",
          "summary": "Canonical URL",
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-56862",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-56862"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-56862",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56862"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/804261",
          "url": "https://go.dev/cl/804261"
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          "category": "external",
          "summary": "https://go.dev/issue/80528",
          "url": "https://go.dev/issue/80528"
        },
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          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/94pEornpRlI",
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        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-6090",
          "url": "https://pkg.go.dev/vuln/GO-2026-6090"
        }
      ],
      "release_date": "2026-08-13T21:58:53.216000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-09-15T14:05:32+00:00",
          "details": "To start using the Web Terminal Operator, install the Web Terminal Operator from OpenShift OperatorHub on OpenShift Container Platform 4.18 or higher.",
          "product_ids": [
            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:9183850d0dcd63f2797c95efbdb9d2cb2819297da3a6263ab3a6bd8ca87f1dac_amd64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:67571"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
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            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
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            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:9183850d0dcd63f2797c95efbdb9d2cb2819297da3a6263ab3a6bd8ca87f1dac_amd64",
            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:971144ce45abdc4a000822ea97e814612a12c89c53d834bdab5b09b3ee317c7e_amd64",
            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:764c61d2ba2856753a704bf143bb081002710b11631cd5d7c91a9363208d194f_amd64",
            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:92404f6ee24cb58305e9c6d44f290cd6a82cdc57dfc1854854a21bab32da560f_amd64"
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        {
          "category": "impact",
          "details": "Important"
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      ],
      "title": "crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages"
    }
  ]
}

CVE-2026-33818 (GCVE-0-2026-33818)

Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-10-01 20:48

Title

Enforce maximum recursion depth in encoding/asn1

Summary

Enforce a recursion limit in Unmarshal to prevent stack exhaustion when parsing deeply-nested, recursive structures.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 15:11 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

Go Google root Scorecard

References

4 references

URL	Tags
https://go.dev/issue/80405
https://groups.google.com/g/golang-announce/c/94p…
https://go.dev/cl/814980
https://pkg.go.dev/vuln/GO-2026-5972

Impacted products

1 product

Vendor	Product	Version
Go standard library	encoding/asn1	Affected: 0 , < 1.25.13 (semver) Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver)

Credits

Marwan Atia (marwansamir688@gmail.com)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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        "providerMetadata": {
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          "shortName": "CISA-ADP"
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              "name": "parseField"
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              "name": "UnmarshalWithParams"
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      ],
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          "value": "Enforce a recursion limit in Unmarshal to prevent stack exhaustion when parsing deeply-nested, recursive structures."
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          "descriptions": [
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              "description": "CWE-400: Uncontrolled Resource Consumption",
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        "dateUpdated": "2026-10-01T20:48:04.541Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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          "url": "https://go.dev/cl/814980"
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        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5972"
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      "title": "Enforce maximum recursion depth in encoding/asn1"
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    "dateReserved": "2026-03-23T20:35:32.815Z",
    "dateUpdated": "2026-10-01T20:48:04.541Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

CVE-2026-56853 (GCVE-0-2026-56853)

Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 15:23

Title

Apply ReadHeaderTimeout when doing unencrypted HTTP/2 check in net/http

Summary

When a server is configured to support unencrypted HTTP/2, it reads a few bytes from each new connection to see if they contain the HTTP/2 client preface. ReadHeaderTimeout is unexpectedly not being applied when doing this.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 15:22 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

Go Google root Scorecard

References

4 references

URL	Tags
https://go.dev/issue/80205
https://go.dev/cl/795540
https://groups.google.com/g/golang-announce/c/94p…
https://pkg.go.dev/vuln/GO-2026-6089

Impacted products

1 product

Vendor	Product	Version
Go standard library	net/http	Affected: 0 , < 1.25.13 (semver) Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
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              "attackComplexity": "LOW",
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                    "Technical Impact": "partial"
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          "dateUpdated": "2026-08-14T15:23:18.680Z",
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        },
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      }
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          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
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          "programRoutines": [
            {
              "name": "conn.readRequest"
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              "name": "conn.serve"
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              "name": "ListenAndServeTLS"
            },
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      "providerMetadata": {
        "dateUpdated": "2026-08-13T21:58:53.092Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/80205"
        },
        {
          "url": "https://go.dev/cl/795540"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6089"
        }
      ],
      "title": "Apply ReadHeaderTimeout when doing unencrypted HTTP/2 check in net/http"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-56853",
    "datePublished": "2026-08-13T21:58:53.092Z",
    "dateReserved": "2026-06-23T15:10:49.352Z",
    "dateUpdated": "2026-08-14T15:23:18.680Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-56859 (GCVE-0-2026-56859)

Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 15:21

Title

Add recursion depth guard during decode in encoding/xml

Summary

Previously, DecodeElement would reset the depth counter causing it to never fire; this could lead to stack exhaustion.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 15:21 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

Go Google root Scorecard

References

4 references

URL	Tags
https://go.dev/issue/80481
https://go.dev/cl/803320
https://groups.google.com/g/golang-announce/c/94p…
https://pkg.go.dev/vuln/GO-2026-6088

Impacted products

1 product

Vendor	Product	Version
Go standard library	encoding/xml	Affected: 0 , < 1.25.13 (semver) Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-56859",
                "options": [
                  {
                    "Exploitation": "none"
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                  },
                  {
                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2026-08-14T15:21:09.615961Z",
                "version": "2.0.3"
              },
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            }
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        "problemTypes": [
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            "descriptions": [
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                "cweId": "CWE-770",
                "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-14T15:21:46.218Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "encoding/xml",
          "product": "encoding/xml",
          "programRoutines": [
            {
              "name": "Decoder.push"
            },
            {
              "name": "Decoder.pop"
            },
            {
              "name": "Decoder.RawToken"
            },
            {
              "name": "Decoder.unmarshalPath"
            },
            {
              "name": "Decoder.unmarshal"
            },
            {
              "name": "Decoder.Decode"
            },
            {
              "name": "Decoder.DecodeElement"
            },
            {
              "name": "Decoder.Skip"
            },
            {
              "name": "Decoder.Token"
            },
            {
              "name": "Unmarshal"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.25.13",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.26.6",
              "status": "affected",
              "version": "1.26.0-0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.27.0-rc.3",
              "status": "affected",
              "version": "1.27.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Previously, DecodeElement would reset the depth counter causing it to never fire; this could lead to stack exhaustion."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-13T21:58:52.959Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
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          "url": "https://go.dev/issue/80481"
        },
        {
          "url": "https://go.dev/cl/803320"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6088"
        }
      ],
      "title": "Add recursion depth guard during decode in encoding/xml"
    }
  },
  "cveMetadata": {
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    "assignerShortName": "Go",
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    "datePublished": "2026-08-13T21:58:52.959Z",
    "dateReserved": "2026-06-23T15:10:49.353Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-56860 (GCVE-0-2026-56860)

Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 16:14

Title

Avoid quadratic complexity in resolvePath in net/url

Summary

Previously, resolving relative paths containing parent directory ('..') segments performed string conversions and buffer rewrites on each step, resulting in quadratic time complexity and high memory allocation overhead. Now, path resolution operates on a byte buffer using index-based backtracking for '..' segments, eliminating the quadratic time complexity and significantly reducing memory allocations.

Severity

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 16:14 UTC

CWE

CWE-407 - Inefficient Algorithmic Complexity

Assigner

Go Google root Scorecard

References

4 references

URL	Tags
https://go.dev/cl/803681
https://go.dev/issue/80494
https://groups.google.com/g/golang-announce/c/94p…
https://pkg.go.dev/vuln/GO-2026-6218

Impacted products

1 product

Vendor	Product	Version
Go standard library	net/url	Affected: 0 , < 1.25.13 (semver) Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 5.9,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-56860",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
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                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-14T16:14:34.601382Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-407",
                "description": "CWE-407 Inefficient Algorithmic Complexity",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-14T16:14:39.166Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "net/url",
          "product": "net/url",
          "programRoutines": [
            {
              "name": "resolvePath"
            },
            {
              "name": "URL.Parse"
            },
            {
              "name": "URL.ResolveReference"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.25.13",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.26.6",
              "status": "affected",
              "version": "1.26.0-0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.27.0-rc.3",
              "status": "affected",
              "version": "1.27.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Previously, resolving relative paths containing parent directory (\u0027..\u0027) segments performed string conversions and buffer rewrites on each step, resulting in quadratic time complexity and high memory allocation overhead. Now, path resolution operates on a byte buffer using index-based backtracking for \u0027..\u0027 segments, eliminating the quadratic time complexity and significantly reducing memory allocations."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-407: Inefficient Algorithmic Complexity",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-13T21:58:53.731Z",
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          "url": "https://go.dev/cl/803681"
        },
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          "url": "https://go.dev/issue/80494"
        },
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          "url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6218"
        }
      ],
      "title": "Avoid quadratic complexity in resolvePath in net/url"
    }
  },
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    "dateUpdated": "2026-08-14T16:14:39.166Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-56862 (GCVE-0-2026-56862)

Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-08-14 15:29

Title

Limit handshake messages we are willing to accept post-handshake in crypto/tls

Summary

Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 15:27 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

Go Google root Scorecard

References

4 references

URL	Tags
https://go.dev/issue/80528
https://go.dev/cl/804261
https://groups.google.com/g/golang-announce/c/94p…
https://pkg.go.dev/vuln/GO-2026-6090

Impacted products

1 product

Vendor	Product	Version
Go standard library	crypto/tls	Affected: 0 , < 1.25.13 (semver) Affected: 1.26.0-0 , < 1.26.6 (semver) Affected: 1.27.0-0 , < 1.27.0-rc.3 (semver)

Credits

Qi Deng of Aurascape.ai

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-56862",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-14T15:27:34.651997Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
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                "cweId": "CWE-770",
                "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-14T15:29:41.741Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "crypto/tls",
          "product": "crypto/tls",
          "programRoutines": [
            {
              "name": "Conn.readRecordOrCCS"
            },
            {
              "name": "Conn.Handshake"
            },
            {
              "name": "Conn.HandshakeContext"
            },
            {
              "name": "Conn.Read"
            },
            {
              "name": "Conn.Write"
            },
            {
              "name": "Dial"
            },
            {
              "name": "DialWithDialer"
            },
            {
              "name": "Dialer.Dial"
            },
            {
              "name": "Dialer.DialContext"
            },
            {
              "name": "QUICConn.HandleData"
            },
            {
              "name": "QUICConn.Start"
            }
          ],
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              "status": "affected",
              "version": "1.26.0-0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.27.0-rc.3",
              "status": "affected",
              "version": "1.27.0-0",
              "versionType": "semver"
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          ]
        }
      ],
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        {
          "lang": "en",
          "value": "Qi Deng of Aurascape.ai"
        }
      ],
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          "value": "Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely."
        }
      ],
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          "descriptions": [
            {
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
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        }
      ],
      "providerMetadata": {
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          "url": "https://go.dev/cl/804261"
        },
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          "url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6090"
        }
      ],
      "title": "Limit handshake messages we are willing to accept post-handshake in crypto/tls"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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    "datePublished": "2026-08-13T21:58:53.216Z",
    "dateReserved": "2026-06-23T15:10:49.353Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

RHSA-2026:67571

CVE-2026-33818 (GCVE-0-2026-33818)

CVE-2026-56853 (GCVE-0-2026-56853)

CVE-2026-56859 (GCVE-0-2026-56859)

CVE-2026-56860 (GCVE-0-2026-56860)

CVE-2026-56862 (GCVE-0-2026-56862)

Tags

Sightings

Nomenclature

Related by attack behaviour