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.
https://www.jenkins.io/security/advisory/2026-06-10/#SECURITY-3711+3755
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53437.json
https://bugzilla.redhat.com/show_bug.cgi?id=2487544
https://access.redhat.com/security/cve/CVE-2026-53437
https://access.redhat.com/errata/RHSA-2026:60259
https://access.redhat.com/errata/RHSA-2026:60256
https://access.redhat.com/errata/RHSA-2026:60254
https://access.redhat.com/errata/RHSA-2026:60252
https://access.redhat.com/errata/RHSA-2026:60251
https://access.redhat.com/errata/RHSA-2026:60250
https://access.redhat.com/errata/RHSA-2026:60249
https://access.redhat.com/errata/RHSA-2026:60248
https://access.redhat.com/errata/RHSA-2026:60247