CVE-2026-27099
Fixed in a distro release EPSS <1%CVSS 8.0
Jenkins 2.483 through 2.550 (both inclusive), LTS 2.492.1 through 2.541.1 (both inclusive) does not escape the user-provided description of the "Mark temporarily offline" offline cause, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Agent/Configure or Agent/Disconnect permission.
Products: Jenkins project Jenkins
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| Maven | org.jenkins-ci.main:jenkins-core | 2.551 |
| Maven | org.jenkins-ci.main:jenkins-core | 2.541.2 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | jenkins-2.516 | 2.516.3-r4 |
| Chainguard | jenkins-2.516-openjdk-17 | 2.516.3-r4 |
| Chainguard | jenkins-2.516-openjdk-21 | 2.516.3-r4 |
| Chainguard | jenkins-2.528 | 2.528.3-r3 |
| Chainguard | jenkins-2.528-openjdk-17 | 2.528.3-r3 |
| Chainguard | jenkins-2.528-openjdk-21 | 2.528.3-r3 |
| Chainguard | jenkins-2.541 | 2.541.2-r0 |
| Chainguard | jenkins-2.541-openjdk-17 | 2.541.2-r0 |
| Chainguard | jenkins-2.541-openjdk-21 | 2.541.2-r0 |