{"id":"BIT-jenkins-2026-53436","details":"Jenkins 2.567 and earlier, LTS 2.555.2 and earlier improperly determines that a redirect URL after login is legitimately pointing to Jenkins when it contains relative path segments (`./` or `../`), allowing attackers to perform phishing attacks.","aliases":["CVE-2026-53436","GHSA-3rqh-hch3-jhpc"],"modified":"2026-09-08T08:48:01.008852259Z","published":"2026-06-12T08:43:05.414Z","database_specific":{"severity":"Medium","cpes":["cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*","cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*","cpe:2.3:a:jenkins:jenkins:*:*:*:*:*:maven:*:*"]},"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53436"},{"type":"ADVISORY","url":"https://www.jenkins.io/security/advisory/2026-06-10/#SECURITY-3711+3755"}],"affected":[{"package":{"name":"jenkins","ecosystem":"Bitnami","purl":"pkg:bitnami/jenkins"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.555.3"},{"introduced":"2.556.0"},{"fixed":"2.568.0"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/jenkins/BIT-jenkins-2026-53436.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N"}]}],"schema_version":"1.9.0"}