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GHSA-8CR3-VPXX-92CX

Vulnerability from github – Published: 2026-03-05 21:30 – Updated: 2026-03-06 22:32
VLAI
Summary
Keycloak SAML Broken has Authentication Bypass by Primary Weakness
Details

A flaw was found in org.keycloak.broker.saml. When a disabled Security Assertion Markup Language (SAML) client is configured as an Identity Provider (IdP)-initiated broker landing target, it can still complete the login process and establish a Single Sign-On (SSO) session. This allows a remote attacker to gain unauthorized access to other enabled clients without re-authentication, effectively bypassing security restrictions.

A fix is available at https://github.com/keycloak/keycloak/releases/tag/26.5.5.

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-broker-saml"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "1.8.1.Final"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-3047"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-305"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-06T22:32:21Z",
    "nvd_published_at": "2026-03-05T19:16:18Z",
    "severity": "HIGH"
  },
  "details": "A flaw was found in org.keycloak.broker.saml. When a disabled Security Assertion Markup Language (SAML) client is configured as an Identity Provider (IdP)-initiated broker landing target, it can still complete the login process and establish a Single Sign-On (SSO) session. This allows a remote attacker to gain unauthorized access to other enabled clients without re-authentication, effectively bypassing security restrictions.\n\nA fix is available at https://github.com/keycloak/keycloak/releases/tag/26.5.5.",
  "id": "GHSA-8cr3-vpxx-92cx",
  "modified": "2026-03-06T22:32:21Z",
  "published": "2026-03-05T21:30:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3047"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:3925"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:3926"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:3947"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:3948"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-3047"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2441966"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/keycloak/keycloak"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/releases/tag/26.5.5"
    }
  ],
  "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 SAML Broken has Authentication Bypass by Primary Weakness"
}



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