MEDIUM 4.3

GHSA-3rqh-hch3-jhpc

Jenkins Open Redirect via Relative Path Segments in Post-Login Redirect URL

Quick fix

GHSA-3rqh-hch3-jhpc — org.jenkins-ci.main:jenkins-core: upgrade to the fixed version with the command below.

# pom.xml: bump <version>2.568</version> for org.jenkins-ci.main:jenkins-core

Details

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.

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Affected packages

Maven / org.jenkins-ci.main:jenkins-core

Introduced in: 2.556 Fixed in: 2.568

Fix # pom.xml: bump <version>2.568</version> for org.jenkins-ci.main:jenkins-core

Maven / org.jenkins-ci.main:jenkins-core

Introduced in: 0 Fixed in: 2.555.3

Fix # pom.xml: bump <version>2.555.3</version> for org.jenkins-ci.main:jenkins-core

References

https://nvd.nist.gov/vuln/detail/CVE-2026-53436 [ADVISORY]
https://github.com/jenkinsci/jenkins/commit/8ef52891b07eb639b38271e4bab5dab3c0f10fda [WEB]
https://github.com/jenkinsci/jenkins/commit/b32f2f27a82ed187a34f55b05edcc4a83563d574 [WEB]
https://github.com/jenkinsci/jenkins [WEB]
https://www.jenkins.io/security/advisory/2026-06-10/#SECURITY-3711+3755 [WEB]