ghsa-2935-2wfm-hhpv
Vulnerability from github
Published
2025-03-25 09:32
Modified
2025-03-25 16:50
Severity ?
4.9 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Summary
Keycloak Denial of Service (DoS) Vulnerability via JWT Token Cache
Details

A flaw was found in Keycloak. When the configuration uses JWT tokens for authentication, the tokens are cached until expiration. If a client uses JWT tokens with an excessively long expiration time, for example, 24 or 48 hours, the cache can grow indefinitely, leading to an OutOfMemoryError. This issue could result in a denial of service condition, preventing legitimate users from accessing the system.

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{
   affected: [
      {
         package: {
            ecosystem: "Maven",
            name: "org.keycloak:keycloak-services",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "0",
                  },
                  {
                     last_affected: "26.1.4",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
   ],
   aliases: [
      "CVE-2025-2559",
   ],
   database_specific: {
      cwe_ids: [
         "CWE-770",
      ],
      github_reviewed: true,
      github_reviewed_at: "2025-03-25T16:50:25Z",
      nvd_published_at: "2025-03-25T09:15:17Z",
      severity: "MODERATE",
   },
   details: "A flaw was found in Keycloak. When the configuration uses JWT tokens for authentication, the tokens are cached until expiration. If a client uses JWT tokens with an excessively long expiration time, for example, 24 or 48 hours, the cache can grow indefinitely, leading to an OutOfMemoryError. This issue could result in a denial of service condition, preventing legitimate users from accessing the system.",
   id: "GHSA-2935-2wfm-hhpv",
   modified: "2025-03-25T16:50:25Z",
   published: "2025-03-25T09:32:07Z",
   references: [
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2025-2559",
      },
      {
         type: "WEB",
         url: "https://access.redhat.com/security/cve/CVE-2025-2559",
      },
      {
         type: "WEB",
         url: "https://bugzilla.redhat.com/show_bug.cgi?id=2353868",
      },
      {
         type: "PACKAGE",
         url: "https://github.com/keycloak/keycloak",
      },
   ],
   schema_version: "1.4.0",
   severity: [
      {
         score: "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
         type: "CVSS_V3",
      },
   ],
   summary: "Keycloak Denial of Service (DoS) Vulnerability via JWT Token Cache",
}


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