CVE-2026-53437: Jenkins Open Redirect Through Newline/Tab Characters in Redirect URL
(updated )
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.
References
- access.redhat.com/errata/RHSA-2026:60239
- access.redhat.com/errata/RHSA-2026:60246
- access.redhat.com/errata/RHSA-2026:60247
- access.redhat.com/errata/RHSA-2026:60248
- access.redhat.com/errata/RHSA-2026:60249
- access.redhat.com/errata/RHSA-2026:60250
- access.redhat.com/errata/RHSA-2026:60251
- access.redhat.com/errata/RHSA-2026:60252
- access.redhat.com/errata/RHSA-2026:60254
- access.redhat.com/errata/RHSA-2026:60256
- access.redhat.com/errata/RHSA-2026:60259
- access.redhat.com/security/cve/CVE-2026-53437
- bugzilla.redhat.com/show_bug.cgi?id=2487544
- github.com/advisories/GHSA-463r-5m89-4xfr
- github.com/jenkinsci/jenkins/commit/8ef52891b07eb639b38271e4bab5dab3c0f10fda
- github.com/jenkinsci/jenkins/commit/b32f2f27a82ed187a34f55b05edcc4a83563d574
- nvd.nist.gov/vuln/detail/CVE-2026-53437
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53437.json
- www.jenkins.io/security/advisory/2026-06-10/
Code Behaviors & Features
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