RHSA-2026:2365

Vulnerability from csaf_redhat - Published: 2026-02-09 20:37 - Updated: 2026-02-10 12:41
Summary
Red Hat Security Advisory: Red Hat build of Keycloak 26.4.9 Security Update

Notes

Topic
New Red Hat build of Keycloak 26.4.9 packages are available from the Customer Portal
Details
Red Hat build of Keycloak 26.4.9 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications. Security fixes: * Unauthorized organization registration via improper invitation token validation (CVE-2026-1529) * Disabled identity providers are still accepted for JWT Authorization Grant (CVE-2026-1486) * Incorrect ownership checks in /uma-policy/ (CVE-2025-14778) * Unauthorized modification of unmanaged user attributes by administrators (CVE-2026-0871) * keycloak-services: Business logic flaw allows unauthorized token issuance for disabled users (CVE-2025-14559) * Limited administrator can retrieve sensitive user attributes via Admin API (CVE-2025-13881)
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.
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        "text": "New Red Hat build of Keycloak 26.4.9 packages are available from the Customer Portal",
        "title": "Topic"
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      {
        "category": "general",
        "text": "Red Hat build of Keycloak 26.4.9 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications.\n\nSecurity fixes:\n* Unauthorized organization registration via improper invitation token validation (CVE-2026-1529)\n* Disabled identity providers are still accepted for JWT Authorization Grant (CVE-2026-1486)\n* Incorrect ownership checks in /uma-policy/ (CVE-2025-14778)\n* Unauthorized modification of unmanaged user attributes by administrators (CVE-2026-0871)\n* keycloak-services: Business logic flaw allows unauthorized token issuance for disabled users (CVE-2025-14559)\n* Limited administrator can retrieve sensitive user attributes via Admin API (CVE-2025-13881)",
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          "category": "summary",
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          "title": "Vulnerability summary"
        },
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          "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.",
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          "details": "Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.",
          "product_ids": [
            "Red Hat build of Keycloak 26.4.9"
          ],
          "restart_required": {
            "category": "none"
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          "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.",
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            "integrityImpact": "NONE",
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      "acknowledgments": [
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            "Aytac Kalinci"
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      "ids": [
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      ],
      "notes": [
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          "category": "description",
          "text": "A flaw was found in the keycloak-services component of Keycloak. This vulnerability allows the issuance of access and refresh tokens for disabled users, leading to unauthorized use of previously revoked privileges, via a business logic vulnerability in the Token Exchange implementation when a privileged client invokes the token exchange flow.",
          "title": "Vulnerability description"
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          "text": "org.keycloak/keycloak-services: Keycloak keycloak-services: Business logic flaw allows unauthorized token issuance for disabled users",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is rated Moderate for Red Hat. A business logic flaw in the Token Exchange implementation of Keycloak allows a privileged client with impersonation permission to issue access and refresh tokens for disabled users. This can lead to unauthorized access by former employees or banned users, despite their accounts being deactivated. Exploitation requires an internal high-privileged client and does not involve user interaction or direct authentication by the disabled user.",
          "title": "Statement"
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        {
          "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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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-14559"
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        {
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          "summary": "RHBZ#2421711",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2421711"
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-14559",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-14559"
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      "release_date": "2026-01-21T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-02-09T20:37:33+00:00",
          "details": "Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.",
          "product_ids": [
            "Red Hat build of Keycloak 26.4.9"
          ],
          "restart_required": {
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        },
        {
          "category": "workaround",
          "details": "To mitigate this issue, disable the Token Exchange preview feature within your Keycloak deployment if it is not actively required. This can typically be achieved through Keycloak\u0027s administrative console or by adjusting relevant configuration settings. If the Token Exchange feature must remain enabled, ensure that only strictly necessary and highly trusted clients are granted the \u0027impersonation\u0027 permission. Any changes to Keycloak configuration may require a service restart or reload to take effect, which could temporarily impact service availability.",
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            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
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            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat build of Keycloak 26.4.9"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "org.keycloak/keycloak-services: Keycloak keycloak-services: Business logic flaw allows unauthorized token issuance for disabled users"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Joshua Rogers"
          ]
        }
      ],
      "cve": "CVE-2025-14778",
      "cwe": {
        "id": "CWE-266",
        "name": "Incorrect Privilege Assignment"
      },
      "discovery_date": "2025-12-16T05:01:06.107000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2422600"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Keycloak. A significant Broken Access Control vulnerability exists in the UserManagedPermissionService (UMA Protection API). When updating or deleting a UMA policy associated with multiple resources, the authorization check only verifies the caller\u0027s ownership against the first resource in the policy\u0027s list. This allows a user (Owner A) who owns one resource (RA) to update a shared policy and modify authorization rules for other resources (e.g., RB) in that same policy, even if those other resources are owned by a different user (Owner B). This constitutes a horizontal privilege escalation.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "keycloak: Incorrect ownership checks in /uma-policy/",
          "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 build of Keycloak 26.4.9"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-14778"
        },
        {
          "category": "external",
          "summary": "RHBZ#2422600",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2422600"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-14778",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-14778"
        },
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          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-14778",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-14778"
        }
      ],
      "release_date": "2026-02-09T18:24:00+00:00",
      "remediations": [
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          "category": "vendor_fix",
          "date": "2026-02-09T20:37:33+00:00",
          "details": "Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.",
          "product_ids": [
            "Red Hat build of Keycloak 26.4.9"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:2365"
        },
        {
          "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": [
            "Red Hat build of Keycloak 26.4.9"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat build of Keycloak 26.4.9"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "keycloak: Incorrect ownership checks in /uma-policy/"
    },
    {
      "cve": "CVE-2026-0871",
      "cwe": {
        "id": "CWE-266",
        "name": "Incorrect Privilege Assignment"
      },
      "discovery_date": "2026-01-13T08:32:26.428000+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2428881"
        }
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      "notes": [
        {
          "category": "description",
          "text": "No description is available for this CVE.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "org.keycloak/keycloak-services: Keycloak: Unauthorized modification of unmanaged user attributes by administrators",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is rated Moderate for Red Hat. An administrator with `manage-users` permission can modify unmanaged user attributes in Keycloak, even when the \"Only administrators can view\" setting is enabled. This bypass requires the realm to be configured with unmanaged attributes set to \"Only administrators can view\" and the administrator to possess `manage-users` permission.",
          "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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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-0871"
        },
        {
          "category": "external",
          "summary": "RHBZ#2428881",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2428881"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-0871",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-0871"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-0871",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-0871"
        }
      ],
      "release_date": "2025-01-13T08:08:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-02-09T20:37:33+00:00",
          "details": "Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.",
          "product_ids": [
            "Red Hat build of Keycloak 26.4.9"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:2365"
        },
        {
          "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": [
            "Red Hat build of Keycloak 26.4.9"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat build of Keycloak 26.4.9"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "org.keycloak/keycloak-services: Keycloak: Unauthorized modification of unmanaged user attributes by administrators"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Reynaldo Immanuel",
            "Joy Gilbert Dan"
          ]
        }
      ],
      "cve": "CVE-2026-1486",
      "cwe": {
        "id": "CWE-358",
        "name": "Improperly Implemented Security Check for Standard"
      },
      "discovery_date": "2026-01-27T13:34:53.016000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2433347"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Keycloak. A vulnerability exists in the jwt-authorization-grant flow where the server fails to verify if an Identity Provider (IdP) is enabled before issuing tokens. The issuer lookup mechanism (lookupIdentityProviderFromIssuer) retrieves the IdP configuration but does not filter for isEnabled=false. If an administrator disables an IdP (e.g., due to a compromise or offboarding), an entity possessing that IdP\u0027s signing key can still generate valid JWT assertions that Keycloak accepts, resulting in the issuance of valid access tokens.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "org.keycloak.protocol.oidc.grants: Disabled identity providers are still accepted for JWT Authorization Grant",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is rated Important for Red Hat products because Keycloak, when configured with JWT authorization grants, fails to verify the enabled status of an Identity Provider (IdP). An attacker possessing the IdP\u0027s signing key can issue valid access tokens even if the IdP has been administratively disabled, leading to unauthorized access.",
          "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": [
          "Red Hat build of Keycloak 26.4.9"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-1486"
        },
        {
          "category": "external",
          "summary": "RHBZ#2433347",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2433347"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-1486",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-1486"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-1486",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1486"
        }
      ],
      "release_date": "2026-02-09T18:23:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-02-09T20:37:33+00:00",
          "details": "Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.",
          "product_ids": [
            "Red Hat build of Keycloak 26.4.9"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:2365"
        },
        {
          "category": "workaround",
          "details": "To mitigate this issue, administrators should immediately revoke or rotate the signing keys associated with any Identity Provider that has been disabled in Keycloak. This operational control is crucial to prevent unauthorized token issuance by ensuring that compromised or offboarded IdP keys cannot be used to generate valid JWT assertions.",
          "product_ids": [
            "Red Hat build of Keycloak 26.4.9"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "Red Hat build of Keycloak 26.4.9"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "org.keycloak.protocol.oidc.grants: Disabled identity providers are still accepted for JWT Authorization Grant"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Reynaldo Immanuel"
          ]
        },
        {
          "names": [
            "Joy Gilbert"
          ],
          "organization": "gwthr"
        }
      ],
      "cve": "CVE-2026-1529",
      "cwe": {
        "id": "CWE-347",
        "name": "Improper Verification of Cryptographic Signature"
      },
      "discovery_date": "2026-01-28T12:29:47.086000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2433783"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Keycloak. An attacker can exploit this vulnerability by modifying the organization ID and target email within a legitimate invitation token\u0027s JSON Web Token (JWT) payload. This lack of cryptographic signature verification allows the attacker to successfully self-register into an unauthorized organization, leading to unauthorized access.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "org.keycloak.services.resources.organizations: Keycloak: Unauthorized organization registration via improper invitation token validation",
          "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 build of Keycloak 26.4.9"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-1529"
        },
        {
          "category": "external",
          "summary": "RHBZ#2433783",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2433783"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-1529",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-1529"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-1529",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1529"
        }
      ],
      "release_date": "2026-02-09T18:21:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-02-09T20:37:33+00:00",
          "details": "Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on.",
          "product_ids": [
            "Red Hat build of Keycloak 26.4.9"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:2365"
        },
        {
          "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": [
            "Red Hat build of Keycloak 26.4.9"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat build of Keycloak 26.4.9"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "org.keycloak.services.resources.organizations: Keycloak: Unauthorized organization registration via improper invitation token validation"
    }
  ]
}


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Sightings

Author Source Type Date

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.