Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Jenkins | Jenkins | < 2.555.3 |
Related Weaknesses (CWE)
References
- https://www.jenkins.io/security/advisory/2026-06-10/#SECURITY-3711+3755Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-53437
- https://bugzilla.redhat.com/show_bug.cgi?id=2487544
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53437.json
FAQ
What is CVE-2026-53437?
CVE-2026-53437 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 `//`, al...
How severe is CVE-2026-53437?
CVE-2026-53437 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-53437?
Check the references section above for vendor advisories and patch information. Affected products include: Jenkins Jenkins.