CVE-2026-53436

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 relative path segments (`./` or `../`), allowing attackers to perform phishing attacks.

CVSS 3.1

4.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 20% of CVEs (scores of 2026-10-25)

CWE

CWE-601

Published

2026-06-10

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• jenkins:jenkins

Packages (OSV)

References

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

Check your stackJSON