CVE-2026-53436
Fixed in a distro release EPSS <1%CVSS 4.3
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.
Products: Jenkins project Jenkins
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| Maven | org.jenkins-ci.main:jenkins-core | 2.568 |
| Maven | org.jenkins-ci.main:jenkins-core | 2.555.3 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | jenkins-2.528 | no fix |
| Chainguard | jenkins-2.541 | no fix |
| Chainguard | jenkins-2.541-openjdk-17 | no fix |
| Chainguard | jenkins-2.541-openjdk-21 | no fix |
| Chainguard | jenkins-2.541-openjdk-25 | no fix |
| Chainguard | jenkins-2.555 | 2.555.3-r0 |