Security advisory

{
  "id": "3486dac5eceee548f095c192eb906ee91dd9fe5038369b3b9633e1ae3984292c",
  "url": "https://osv.dev/vulnerability/CVE-2026-27099",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-27099",
    "summary": "Jenkins 2.483 through 2.550 (both inclusive), LTS 2.492.1 through 2.541.1 (both inclusive) does not escape the user-provided description of the \"Mark temporarily offline\" offline cause, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Agent/Configure or Agent/Disconnect permission.",
    "evidence": "osv:CVE-2026-27099",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-27099",
      "aliases": [
        "BIT-jenkins-2026-27099",
        "CVE-2026-27099",
        "GHSA-85h6-5m3v-gx37"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/jenkinsci/jenkins",
              "type": "GIT",
              "events": [
                {
                  "introduced": "137b3d0ff9b7bace2b9683f1e616bbbbce7ad1ca"
                },
                {
                  "fixed": "714eeca02d35290fafb5f46dfa5a7ac1e4f26bab"
                },
                {
                  "introduced": "cbd272880677edffab51c8f8f00ddfa35f8bf4ac"
                },
                {
                  "fixed": "fc71f0677ff81340ba7eb19b2d571fb9af230437"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*",
                    "range": [
                      {
                        "introduced": "2.483"
                      },
                      {
                        "fixed": "2.551"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*",
                    "range": [
                      {
                        "introduced": "2.492.1"
                      },
                      {
                        "fixed": "2.541.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "jenkins-2.541.2-rc",
            "jenkins-2.550",
            "jenkins-2.549",
            "jenkins-2.548",
            "jenkins-2.541.1",
            "jenkins-2.541.1-rc",
            "jenkins-2.547",
            "jenkins-2.546",
            "jenkins-2.545",
            "jenkins-2.544",
            "jenkins-2.543",
            "jenkins-2.542",
            "jenkins-2.541",
            "jenkins-2.540",
            "jenkins-2.539",
            "jenkins-2.538",
            "jenkins-2.537",
            "jenkins-2.536",
            "jenkins-2.535",
            "jenkins-2.534",
            "jenkins-2.533",
            "jenkins-2.532",
            "jenkins-2.531",
            "jenkins-2.530",
            "jenkins-2.529",
            "jenkins-2.528",
            "jenkins-2.527",
            "jenkins-2.526",
            "jenkins-2.525",
            "jenkins-2.524",
            "jenkins-2.523",
            "jenkins-2.522",
            "jenkins-2.521",
            "jenkins-2.520",
            "jenkins-2.519",
            "jenkins-2.518",
            "jenkins-2.517",
            "jenkins-2.516",
            "jenkins-2.515",
            "jenkins-2.514",
            "jenkins-2.513",
            "jenkins-2.512",
            "jenkins-2.511",
            "jenkins-2.510",
            "jenkins-2.509",
            "jenkins-2.508",
            "jenkins-2.507",
            "jenkins-2.506",
            "jenkins-2.505",
            "jenkins-2.504",
            "jenkins-2.503",
            "jenkins-2.502",
            "jenkins-2.501",
            "jenkins-2.500",
            "jenkins-2.499",
            "jenkins-2.498",
            "jenkins-2.497",
            "jenkins-2.496",
            "jenkins-2.495",
            "jenkins-2.494",
            "jenkins-2.493",
            "jenkins-2.492",
            "jenkins-2.491",
            "jenkins-2.490",
            "jenkins-2.489",
            "jenkins-2.488",
            "jenkins-2.487",
            "jenkins-2.486",
            "jenkins-2.485",
            "jenkins-2.484",
            "jenkins-2.483"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27099.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:44.146246064Z",
      "provider": "osv",
      "references": [
        "https://www.jenkins.io/security/advisory/2026-02-18/#SECURITY-3669"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2026-27099",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 435797,
  "published_at": "2026-02-18T15:18:43.857+00:00"
}