CVE-2026-27100
Jenkins has a build information disclosure vulnerability through Run Parameter
4.3
MEDIUM
CVSS 3.1
EPSS 0.35%
Description
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.
How to fix CVE-2026-27100
To remediate CVE-2026-27100, upgrade the affected package to a fixed version below.
- —upgrade to 2.541.2 or later
- —upgrade to 2.551 or later
Is CVE-2026-27100 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- >= 2.483.0, < 2.541.2, >= 2.542.0, < 2.551.0
- >= 2.542, < 2.551
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |