GHSA-37GF-GMXV-74WV

Vulnerability from github – Published: 2026-02-09 21:31 – Updated: 2026-02-13 21:49
VLAI
Summary
Keycloak fails to verify if an Identity Provider (IdP) is enabled before issuing tokens
Details

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's signing key can still generate valid JWT assertions that Keycloak accepts, resulting in the issuance of valid access tokens.

Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.keycloak:keycloak-services"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "26.5.0"
            },
            {
              "fixed": "26.5.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.keycloak:keycloak-services"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "26.4.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-1486"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-358"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-10T18:35:15Z",
    "nvd_published_at": "2026-02-09T20:15:55Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-37gf-gmxv-74wv",
  "modified": "2026-02-13T21:49:42Z",
  "published": "2026-02-09T21:31:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1486"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/issues/46146"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/pull/46148"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/commit/176dc8902ce552056d3648c4601d519afc6fb043"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/commit/8316e8538f0037d9f998181e73122cff93a94035"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:2365"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:2366"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-1486"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2433347"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/keycloak/keycloak"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Keycloak fails to verify if an Identity Provider (IdP) is enabled before issuing tokens"
}



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