GHSA-V5G5-WWMP-JPPW

Vulnerability from github – Published: 2026-05-28 06:31 – Updated: 2026-07-01 21:27
VLAI
Summary
Keycloak has Insufficient Session Expiration
Details

A flaw was found in Keycloak. When revokeRefreshToken=true is enabled and persistent session storage is in use, a server restart can reset internal timing mechanisms. This allows a remote attacker, who has previously captured a user's refresh token, to replay that token even after it has been revoked. Successful exploitation grants the attacker unauthorized access to the victim's account, potentially leading to information disclosure or privilege escalation.

Severity
6.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.keycloak:keycloak-services"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "26.4.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.keycloak:keycloak-services"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "26.5.0"
            },
            {
              "fixed": "26.6.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-9802"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-613"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-01T21:27:04Z",
    "nvd_published_at": "2026-05-28T06:16:29Z",
    "severity": "MODERATE"
  },
  "details": "A flaw was found in Keycloak. When revokeRefreshToken=true is enabled and persistent session storage is in use, a server restart can reset internal timing mechanisms. This allows a remote attacker, who has previously captured a user\u0027s refresh token, to replay that token even after it has been revoked. Successful exploitation grants the attacker unauthorized access to the victim\u0027s account, potentially leading to information disclosure or privilege escalation.",
  "id": "GHSA-v5g5-wwmp-jppw",
  "modified": "2026-07-01T21:27:04Z",
  "published": "2026-05-28T06:31:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9802"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/issues/49426"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/pull/49542"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/pull/49619"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/pull/49620"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/commit/165df48d3f0f42ede8e6082184892ca7cc703989"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/commit/3451217e3837ce5e8bbcac2773f0ac44830b95f1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/commit/3fde018b98e2729a594a3ac7fc730fde31da2f07"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:25097"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:25098"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:30049"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:30050"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-9802"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482467"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/keycloak/keycloak"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Keycloak has Insufficient Session Expiration"
}



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