Vulnerability-Lookup

RHBA-2026:92269

Vulnerability from csaf_redhat - Published: 2026-10-29 06:41 - Updated: 2026-11-02 18:40

Summary

Red Hat Bug Fix Advisory: zero trust workload identity manager for Red Hat OpenShift 1.0.4

Severity

Important

Notes

Topic: zero trust workload identity manager for Red Hat OpenShift 1.0.4

Details: The Zero Trust Workload Identity Manager (ZTWIM) is a day-2 operator. The operator manages lifecycle of operand components from SPIRE project. The goal of ZTWIM is to provide secure, verifiable workload identities for workloads in multi-cloud environments. The operand components automate identity issuance, rotation, and verification, enhancing the zero-trust security model while eliminating static credentials. The current release of zero trust workload identity manager for Red Hat OpenShift is Generally Available.

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

Affected products

Fixed 4 products

Product	Version	Remediation
Unresolved product id: Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:1cfcb35a6499b6a8868177ba8ee0a3c47c76a8cf878d583a01dcc4d891c09bfc_arm64	—	Vendor Fix fix Workaround
Unresolved product id: Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:3993fbdd8975ecb3c16b227277b54afd560854c9afafa4eda02e3696f7015e98_amd64	—	Vendor Fix fix Workaround
Unresolved product id: Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:afae79ec873913bed90bb2154b43d94ccadd57110591b4ed1560bb7b21c3517c_s390x	—	Vendor Fix fix Workaround
Unresolved product id: Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:f144912d9b3e2254a7ca3d398f9f55c7ba9a5ab62e0dfa51ba34949a52fc931e_ppc64le	—	Vendor Fix fix Workaround

Threats

Impact Important

CVE-2026-111943

A flaw was found in Go's crypto/x509 package. The certificate verification process fails to block trust in intermediate certificates associated with a compromised Certificate Authority (CA). A remote attacker presenting a certificate signed by these intermediate authorities can impersonate legitimate servers during secure connections. This flaw can enable an attacker to conduct a man-in-the-middle (MitM) attack to intercept or alter confidential communications.

6.8 (Medium)


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

CWE-295 - Improper Certificate Validation

Affected products

Fixed 4 products, the same list as for CVE-2026-33818

Threats

Impact Important

References

21 references

URL	Category
https://access.redhat.com/errata/RHBA-2026:92269	self
https://docs.redhat.com/en/documentation/openshif…	external
https://access.redhat.com/security/cve/CVE-2026-111943	external
https://access.redhat.com/security/cve/CVE-2026-33818	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-2026-111943	self
https://bugzilla.redhat.com/show_bug.cgi?id=2556068	external
https://access.redhat.com/security/vulnerabilitie…	external
https://www.cve.org/CVERecord?id=CVE-2026-111943	external
https://nvd.nist.gov/vuln/detail/CVE-2026-111943	external
https://github.com/golang/go/issues/82345	external
https://groups.google.com/g/golang-nuts/c/K22sG2AYnKU	external
https://pkg.go.dev/vuln/GO-2026-6809	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"
      },
      "discovery_date": "2026-08-13T22:12:37.151735+00:00",
      "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"
        }
      ],
      "product_status": {
        "fixed": [
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          "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:3993fbdd8975ecb3c16b227277b54afd560854c9afafa4eda02e3696f7015e98_amd64",
          "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:afae79ec873913bed90bb2154b43d94ccadd57110591b4ed1560bb7b21c3517c_s390x",
          "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:f144912d9b3e2254a7ca3d398f9f55c7ba9a5ab62e0dfa51ba34949a52fc931e_ppc64le"
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-33818"
        },
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2515815"
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          "url": "https://www.cve.org/CVERecord?id=CVE-2026-33818"
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          "url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
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          "summary": "https://pkg.go.dev/vuln/GO-2026-5972",
          "url": "https://pkg.go.dev/vuln/GO-2026-5972"
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      ],
      "release_date": "2026-08-13T21:58:52.821000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-29T06:41:16+00:00",
          "details": "Before installing the operator, make sure all previously released errata relevant to your system have been applied.\n\nThe steps to apply the upgraded images will differ depending on the installation plan approval policy that will be used\nwhile installing the zero trust workload identity manager for Red Hat OpenShift.\n\n- If the approval policy is set to `Automatic`, then the Operator will be upgraded automatically when there is a\nnew version of the Operator. No further action is required to upgrade. This is the default setting.\n\n- If you changed the approval policy to `Manual`, then you must manually approve the upgrade to the Operator.",
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            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:3993fbdd8975ecb3c16b227277b54afd560854c9afafa4eda02e3696f7015e98_amd64",
            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:afae79ec873913bed90bb2154b43d94ccadd57110591b4ed1560bb7b21c3517c_s390x",
            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:f144912d9b3e2254a7ca3d398f9f55c7ba9a5ab62e0dfa51ba34949a52fc931e_ppc64le"
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            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHBA-2026:92269"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
          "product_ids": [
            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:1cfcb35a6499b6a8868177ba8ee0a3c47c76a8cf878d583a01dcc4d891c09bfc_arm64",
            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:3993fbdd8975ecb3c16b227277b54afd560854c9afafa4eda02e3696f7015e98_amd64",
            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:afae79ec873913bed90bb2154b43d94ccadd57110591b4ed1560bb7b21c3517c_s390x",
            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:f144912d9b3e2254a7ca3d398f9f55c7ba9a5ab62e0dfa51ba34949a52fc931e_ppc64le"
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        {
          "cvss_v3": {
            "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"
          },
          "products": [
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            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:3993fbdd8975ecb3c16b227277b54afd560854c9afafa4eda02e3696f7015e98_amd64",
            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:afae79ec873913bed90bb2154b43d94ccadd57110591b4ed1560bb7b21c3517c_s390x",
            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:f144912d9b3e2254a7ca3d398f9f55c7ba9a5ab62e0dfa51ba34949a52fc931e_ppc64le"
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      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal"
    },
    {
      "cve": "CVE-2026-111943",
      "cwe": {
        "id": "CWE-295",
        "name": "Improper Certificate Validation"
      },
      "discovery_date": "2026-10-20T09:38:36.160000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2556068"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Go\u0027s crypto/x509 package. The certificate verification process fails to block trust in intermediate certificates associated with a compromised Certificate Authority (CA). A remote attacker presenting a certificate signed by these intermediate authorities can impersonate legitimate servers during secure connections. This flaw can enable an attacker to conduct a man-in-the-middle (MitM) attack to intercept or alter confidential communications.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "crypto/x509: golang: crypto/x509: Man-in-the-middle attacks via untrusted intermediate certificates",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is rated Important because Go applications validating TLS certificates could accept unauthorized certificates issued by distrusted intermediate Certificate Authorities, potentially compromising the integrity and confidentiality of secure network communications. Any Go-based client or server relying on standard certificate verification may be exposed to man-in-the-middle attacks if an attacker intercepts traffic using certificates derived from these intermediate keys. Exploitation requires specific network positioning and certificates generated by the untrusted intermediate authorities, limiting opportunistic widespread abuse.",
          "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": {
        "fixed": [
          "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:1cfcb35a6499b6a8868177ba8ee0a3c47c76a8cf878d583a01dcc4d891c09bfc_arm64",
          "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:3993fbdd8975ecb3c16b227277b54afd560854c9afafa4eda02e3696f7015e98_amd64",
          "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:afae79ec873913bed90bb2154b43d94ccadd57110591b4ed1560bb7b21c3517c_s390x",
          "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:f144912d9b3e2254a7ca3d398f9f55c7ba9a5ab62e0dfa51ba34949a52fc931e_ppc64le"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-111943"
        },
        {
          "category": "external",
          "summary": "RHBZ#2556068",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2556068"
        },
        {
          "category": "external",
          "summary": "RHSB-2026-012",
          "url": "https://access.redhat.com/security/vulnerabilities/RHSB-2026-012"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-111943",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-111943"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-111943",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111943"
        },
        {
          "category": "external",
          "summary": "https://github.com/golang/go/issues/82345",
          "url": "https://github.com/golang/go/issues/82345"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-nuts/c/K22sG2AYnKU",
          "url": "https://groups.google.com/g/golang-nuts/c/K22sG2AYnKU"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-6809",
          "url": "https://pkg.go.dev/vuln/GO-2026-6809"
        }
      ],
      "release_date": "2026-10-20T02:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-29T06:41:16+00:00",
          "details": "Before installing the operator, make sure all previously released errata relevant to your system have been applied.\n\nThe steps to apply the upgraded images will differ depending on the installation plan approval policy that will be used\nwhile installing the zero trust workload identity manager for Red Hat OpenShift.\n\n- If the approval policy is set to `Automatic`, then the Operator will be upgraded automatically when there is a\nnew version of the Operator. No further action is required to upgrade. This is the default setting.\n\n- If you changed the approval policy to `Manual`, then you must manually approve the upgrade to the Operator.",
          "product_ids": [
            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:1cfcb35a6499b6a8868177ba8ee0a3c47c76a8cf878d583a01dcc4d891c09bfc_arm64",
            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:3993fbdd8975ecb3c16b227277b54afd560854c9afafa4eda02e3696f7015e98_amd64",
            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:afae79ec873913bed90bb2154b43d94ccadd57110591b4ed1560bb7b21c3517c_s390x",
            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:f144912d9b3e2254a7ca3d398f9f55c7ba9a5ab62e0dfa51ba34949a52fc931e_ppc64le"
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          "restart_required": {
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          "url": "https://access.redhat.com/errata/RHBA-2026:92269"
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        {
          "category": "workaround",
          "details": "See the security bulletin for a detailed mitigation procedure.",
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            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:3993fbdd8975ecb3c16b227277b54afd560854c9afafa4eda02e3696f7015e98_amd64",
            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:afae79ec873913bed90bb2154b43d94ccadd57110591b4ed1560bb7b21c3517c_s390x",
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          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
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            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
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            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:3993fbdd8975ecb3c16b227277b54afd560854c9afafa4eda02e3696f7015e98_amd64",
            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:afae79ec873913bed90bb2154b43d94ccadd57110591b4ed1560bb7b21c3517c_s390x",
            "Zero Trust Workload Identity Manager 1.0:registry.redhat.io/zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9@sha256:f144912d9b3e2254a7ca3d398f9f55c7ba9a5ab62e0dfa51ba34949a52fc931e_ppc64le"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "crypto/x509: golang: crypto/x509: Man-in-the-middle attacks via untrusted intermediate certificates"
    }
  ]
}

CVE-2026-111943 (GCVE-0-2026-111943)

Vulnerability from cvelistv5 – Published: 2026-10-21 00:52 – Updated: 2026-10-30 13:08

Title

Distrust compromised intermediate certificates in crypto/x509

Summary

On most platforms, Go uses the given system root certificates. However, in some narrower cases, the system trust stores may not be updated without further action. To defend against the narrower set of cases that may remain affected, a denylist was added in crypto/x509 to return an error when calling Verify with any of the known intermediate certificates that are no longer considered to be trustworthy.

Severity

6.8 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 13:08 UTC

CWE

CWE-299 - Improper Check for Certificate Revocation

Assigner

Go CNA under the Google root

CNA scorecard E 42/100 over 75 records in the last 180 days details

References

5 references

URL	Tags
https://go.dev/cl/851047
https://go.dev/issue/82345
https://groups.google.com/g/golang-announce/c/66p…
https://pkg.go.dev/vuln/GO-2026-6809
http://www.openwall.com/lists/oss-security/2026/1…

Impacted products

1 product

Vendor	Product	Version
Go standard library	crypto/x509	Affected: 0 , < 1.26.10 (semver) Affected: 1.27.0-0 , < 1.27.3 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-10-21T01:24:20.498Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/10/20/29"
          }
        ],
        "title": "CVE Program Container"
      },
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        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 6.8,
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              "confidentialityImpact": "HIGH",
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              "version": "3.1"
            }
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          {
            "other": {
              "content": {
                "id": "CVE-2026-111943",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
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                    "Technical Impact": "total"
                  }
                ],
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                "timestamp": "2026-10-30T13:08:09.750640Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
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            "descriptions": [
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                "cweId": "CWE-299",
                "description": "CWE-299 Improper Check for Certificate Revocation",
                "lang": "en",
                "type": "CWE"
              }
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        "title": "CISA ADP Vulnrichment"
      }
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          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "crypto/x509",
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            {
              "name": "Certificate.Verify"
            }
          ],
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              "lessThan": "1.26.10",
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              "versionType": "semver"
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              "versionType": "semver"
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        }
      ],
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        {
          "descriptions": [
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              "description": "CWE-299: Improper Check for Certificate Revocation",
              "lang": "en"
            }
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      "providerMetadata": {
        "dateUpdated": "2026-10-21T00:52:18.359Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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      },
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        },
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    "datePublished": "2026-10-21T00:52:18.359Z",
    "dateReserved": "2026-10-17T13:43:28.599Z",
    "dateUpdated": "2026-10-30T13:08:13.559Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

Vulnerability from cvelistv5 – Published: 2026-08-13 21:58 – Updated: 2026-11-02 17:21

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 CNA under the Google root

CNA scorecard E 42/100 over 75 records in the last 180 days details

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",
              "availabilityImpact": "HIGH",
              "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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            }
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                "id": "CVE-2026-33818",
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                  },
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                    "Technical Impact": "partial"
                  }
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                "timestamp": "2026-08-14T15:11:19.904646Z",
                "version": "2.0.3"
              },
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            }
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        "providerMetadata": {
          "dateUpdated": "2026-08-14T15:12:34.877Z",
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "encoding/asn1",
          "product": "encoding/asn1",
          "programRoutines": [
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              "name": "parseSequenceOf"
            },
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              "name": "parseField"
            },
            {
              "name": "UnmarshalWithParams"
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            }
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            {
              "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"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Marwan Atia (marwansamir688@gmail.com)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Enforce a recursion limit in Unmarshal to prevent stack exhaustion when parsing deeply-nested, recursive structures."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-400: Uncontrolled Resource Consumption",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-02T17:21:59.041Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/80405"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/94pEornpRlI"
        },
        {
          "url": "https://go.dev/cl/814980"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5972"
        }
      ],
      "title": "Enforce maximum recursion depth in encoding/asn1"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-33818",
    "datePublished": "2026-08-13T21:58:52.821Z",
    "dateReserved": "2026-03-23T20:35:32.815Z",
    "dateUpdated": "2026-11-02T17:21:59.041Z",
    "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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

RHBA-2026:92269

CVE-2026-111943 (GCVE-0-2026-111943)

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

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Sightings

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Vulnerability timeline

Related by attack behaviour