CVE-2026-27100

Jenkins has a build information disclosure vulnerability through Run Parameter

4.3 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: None

Exploit likelihood

0.37%Up 0.3 points since Feb 19, 2026

What each source reports

CVE List Score used 4.3

Record: CVE-2026-27100
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

EUVDEUVD-2026-8092 4.3

Record: EUVD-2026-8092
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-wfhp-qgm8-5p5c 4.3

Jenkins has a build information disclosure vulnerability through Run Parameter

Record: GHSA-wfhp-qgm8-5p5c
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

NVD 4.3

Record: CVE-2026-27100
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

OSV 4.3

Record: CVE-2026-27100
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVGHSA-wfhp-qgm8-5p5c 4.3

Jenkins has a build information disclosure vulnerability through Run Parameter

Record: GHSA-wfhp-qgm8-5p5c
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

OSVROOT-APP-MAVEN-CVE-2026-27100 4.3

CVE-2026-27100 in io.root.org.jenkins-ci.main:jenkins-core - Patched by Root

Root has patched CVE-2026-27100 in the io.root.org.jenkins-ci.main:jenkins-core package for Root:Maven. Multiple fixed versions available.

Record: ROOT-APP-MAVEN-CVE-2026-27100
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVBIT-jenkins-2026-27100 No score

Record: BIT-jenkins-2026-27100
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`org.jenkins-ci.main:jenkins-core` Maven	2.542 up to 2.551	2.551
`org.jenkins-ci.main:jenkins-core` Maven	before 2.541.2	2.541.2
`jenkins` Bitnami	2.483.0 up to 2.541.2, 2.542.0 up to 2.551.0	2.541.22.551.0
`org.jenkins-ci.main:jenkins-core` Maven	2.542 up to 2.551, plus listed versions 2.5432.5442.5452.5462.5472.5482.5492.550	2.551
`org.jenkins-ci.main:jenkins-core` Maven	before 2.541.2, plus listed versions 1.3961.3971.3981.3991.400 Show 45 moreShow less 1.4011.4031.4041.4051.4061.4071.4081.4091.409.11.409.21.409.31.4101.4111.4121.4131.4141.4151.4161.4171.4181.4191.4201.4211.4221.4231.4241.424.11.424.21.424.31.424.41.424.51.424.61.4251.4261.4271.4281.4291.4301.4311.4321.4331.4341.4351.4361.437	2.541.2
`io.root.org.jenkins-ci.main:jenkins-core` Root:Maven	before 2.533-root.io.5	2.533-root.io.52.533-root.io.7
`org.jenkins-ci.main:jenkins-core` Root:Maven	before 2.533-aikido.7	2.533-aikido.7

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-27100 is a medium vulnerability (CVSS 4.3) in Jenkins, published February 18, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.37%, the 31st percentile. Fixed in org.jenkins-ci.main:jenkins-core 2.551.

References

This page doesn't list everything

Left out here: 947 versions. The JSON record has them.