RHSA-2026:22962

Vulnerability from csaf_redhat - Published: 2026-06-03 19:07 - Updated: 2026-06-08 06:02
Summary
Red Hat Security Advisory: Red Hat Web Terminal Operator 1.13.0 release.
Severity
Important
Notes
Topic: Red Hat Web Terminal Operator 1.13.0 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-2026-32280

A flaw was found in the Go standard library packages `crypto/x509` and `crypto/tls`. During the process of building a certificate chain, an attacker can provide a large number of intermediate certificates. This excessive input is not properly limited, leading to an uncontrolled amount of work being performed. This can result in a denial of service (DoS) condition, making the affected system or application unavailable to legitimate users.

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
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:5520b0338d4d24d7c167cfaf781702765d214ced986941d474d64d4c3cb37e6e_amd64 —
Vendor Fix fix
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:ff65894cc6f9274dfa3c3a083c3159ca05807365c688438f1b90d04200ac0f9f_amd64 —
Unresolved product id: Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:c8869b4951f6b4af39652783713e03adab69e9088f811ce15bf2c71c0de4ad14_amd64 —
Unresolved product id: Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:fb6238202bc32b7787e640f18a19e2a1252faa0e324e41eed70104712cc86281_amd64 —
Threats
Impact Important
CVE-2026-33810

A flaw was found in the `crypto/x509` package within Go (golang). When verifying a certificate chain, excluded DNS (Domain Name System) constraints are not correctly applied to wildcard DNS Subject Alternative Names (SANs) if the case of the SAN differs from the constraint. This oversight could allow an attacker to bypass certificate validation, potentially leading to the acceptance of a malicious certificate that should have been rejected. This issue specifically impacts the validation of trusted certificate chains.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:L
CWE-1289 - Improper Validation of Unsafe Equivalence in Input
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:5520b0338d4d24d7c167cfaf781702765d214ced986941d474d64d4c3cb37e6e_amd64 —
Vendor Fix fix
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:ff65894cc6f9274dfa3c3a083c3159ca05807365c688438f1b90d04200ac0f9f_amd64 —
Unresolved product id: Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:c8869b4951f6b4af39652783713e03adab69e9088f811ce15bf2c71c0de4ad14_amd64 —
Unresolved product id: Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:fb6238202bc32b7787e640f18a19e2a1252faa0e324e41eed70104712cc86281_amd64 —
Threats
Impact Important
References
To clipboard 

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          "text": "A flaw was found in the Go standard library packages `crypto/x509` and `crypto/tls`. During the process of building a certificate chain, an attacker can provide a large number of intermediate certificates. This excessive input is not properly limited, leading to an uncontrolled amount of work being performed. This can result in a denial of service (DoS) condition, making the affected system or application unavailable to legitimate users.",
          "title": "Vulnerability description"
        },
        {
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          "text": "crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building",
          "title": "Vulnerability summary"
        },
        {
          "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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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
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            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
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      "flags": [
        {
          "label": "vulnerable_code_not_present",
          "product_ids": [
            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:ff65894cc6f9274dfa3c3a083c3159ca05807365c688438f1b90d04200ac0f9f_amd64",
            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:c8869b4951f6b4af39652783713e03adab69e9088f811ce15bf2c71c0de4ad14_amd64",
            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:fb6238202bc32b7787e640f18a19e2a1252faa0e324e41eed70104712cc86281_amd64"
          ]
        }
      ],
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2456335"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the `crypto/x509` package within Go (golang). When verifying a certificate chain, excluded DNS (Domain Name System) constraints are not correctly applied to wildcard DNS Subject Alternative Names (SANs) if the case of the SAN differs from the constraint. This oversight could allow an attacker to bypass certificate validation, potentially leading to the acceptance of a malicious certificate that should have been rejected. This issue specifically impacts the validation of trusted certificate chains.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application",
          "title": "Vulnerability summary"
        },
        {
          "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": [
          "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:5520b0338d4d24d7c167cfaf781702765d214ced986941d474d64d4c3cb37e6e_amd64"
        ],
        "known_not_affected": [
          "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:ff65894cc6f9274dfa3c3a083c3159ca05807365c688438f1b90d04200ac0f9f_amd64",
          "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:c8869b4951f6b4af39652783713e03adab69e9088f811ce15bf2c71c0de4ad14_amd64",
          "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:fb6238202bc32b7787e640f18a19e2a1252faa0e324e41eed70104712cc86281_amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-33810"
        },
        {
          "category": "external",
          "summary": "RHBZ#2456335",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2456335"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-33810",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-33810"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-33810",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33810"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/763763",
          "url": "https://go.dev/cl/763763"
        },
        {
          "category": "external",
          "summary": "https://go.dev/issue/78332",
          "url": "https://go.dev/issue/78332"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU",
          "url": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-4866",
          "url": "https://pkg.go.dev/vuln/GO-2026-4866"
        }
      ],
      "release_date": "2026-04-08T01:06:56.546000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-03T19:07:57+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@sha256:5520b0338d4d24d7c167cfaf781702765d214ced986941d474d64d4c3cb37e6e_amd64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:22962"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:L",
            "version": "3.1"
          },
          "products": [
            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:5520b0338d4d24d7c167cfaf781702765d214ced986941d474d64d4c3cb37e6e_amd64",
            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:ff65894cc6f9274dfa3c3a083c3159ca05807365c688438f1b90d04200ac0f9f_amd64",
            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:c8869b4951f6b4af39652783713e03adab69e9088f811ce15bf2c71c0de4ad14_amd64",
            "Red Hat Web Terminal 1.13:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:fb6238202bc32b7787e640f18a19e2a1252faa0e324e41eed70104712cc86281_amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application"
    }
  ]
}


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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Detection rules are retrieved from Rulezet.