CVE-2026-53437

Name: CVE-2026-53437
Creator: NVD / NIST
Published: 2026-06-10T14:16:36.677+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.28%

Last modified Jun 17, 2026

CVE-2026-53437 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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.. EPSS estimates a 0.28% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS Probability

0.28%

19.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-601

Affected Software

Vendor	Product	Versions
Jenkins	Jenkins	< 2.555.3
Jenkins	Jenkins	< 2.568

References

https://www.jenkins.io/security/advisory/2026-06-10/#SECURITY-3711+3755Vendor Advisory

Timeline

Published: Jun 10, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-53437?

How severe is CVE-2026-53437?

CVE-2026-53437 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.

How do I fix CVE-2026-53437?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-53437?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST