{"id":"CVE-2026-53437","aliases":["BIT-jenkins-2026-53437","GHSA-463r-5m89-4xfr"],"url":"https://o3.security/vulnerability/CVE-2026-53437","summary":"Jenkins Open Redirect Through Newline/Tab Characters in Redirect URL","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 tab or newline characters between `//`, allowing attackers to perform phishing attacks.","published":"2026-06-10T14:16:36.677Z","modified":"2026-08-28T08:05:17.268307Z","cvss":{"score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N"},"epss":{"score":0.00469,"percentile":0.39507,"asOf":"2026-09-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.jenkins-ci.main:jenkins-core","fixedVersion":"2.555.3"},{"ecosystem":"Maven","name":"org.jenkins-ci.main:jenkins-core","fixedVersion":"2.568"}],"fix":{"url":"https://github.com/jenkinsci/jenkins/commit/b32f2f27a82ed187a34f55b05edcc4a83563d574","label":"jenkinsci/jenkins@b32f2f2"},"references":[{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-53437"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53437.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:60239"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:60246"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:60247"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:60248"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:60249"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:60250"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:60251"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:60252"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:60254"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:60256"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:60259"},{"type":"ADVISORY","url":"https://www.jenkins.io/security/advisory/2026-06-10/#SECURITY-3711+3755"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2487544"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53437"},{"type":"WEB","url":"https://github.com/jenkinsci/jenkins/commit/b32f2f27a82ed187a34f55b05edcc4a83563d574"},{"type":"WEB","url":"https://github.com/jenkinsci/jenkins/commit/8ef52891b07eb639b38271e4bab5dab3c0f10fda"},{"type":"PACKAGE","url":"https://github.com/jenkinsci/jenkins"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-28T08:05:17.268307Z"}}