CVE-2026-27100
Fixed in a distro release EPSS <1%CVSS 4.3
Jenkins 2.550 and earlier, LTS 2.541.1 and earlier accepts Run Parameter values that refer to builds the user submitting the build does not have access to, allowing attackers with Item/Build and Item/Configure permission to obtain information about the existence of jobs, the existence of builds, and if a specified build exists, its display name.
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 |