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Fencer Vulns
medium 4.3

CVE-2026-27100 json

Jenkins has a build information disclosure vulnerability through Run Parameter

published 2026-02-18 8 mo ago modified 2026-09-10 59 d ago also BIT-jenkins-2026-27100 , EUVD-2026-8092 , GHSA-wfhp-qgm8-5p5c

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

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.

Patch / fix

  • maven org.jenkins-ci.main:jenkins-core 2.541.2, 2.551
  • bitnami jenkins 2.541.2, 2.551.0
  • Jenkins Project Jenkins 2.551

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-27100 updated cvss 4.3

org.jenkins-ci.main/jenkins-core: Jenkins: Information disclosure via unauthorized access to build parameters

  • Red Hat OpenShift Developer Tools and Services jenkins
    affected: no fix available “Fix deferred”
  • Red Hat OpenShift Developer Tools and Services 4.12 ocp-tools-4 1776764096
    fixed: vendor fix RHSA-2026:10209
  • Red Hat OpenShift Developer Tools and Services 4.13 ocp-tools-4 1776764096
    fixed: vendor fix RHSA-2026:10201
  • Red Hat OpenShift Developer Tools and Services 4.14 ocp-tools-4 1776762347
    fixed: vendor fix RHSA-2026:10211
  • Red Hat OpenShift Developer Tools and Services 4.15 ocp-tools-4 1776762347
    fixed: vendor fix RHSA-2026:10204
  • Red Hat OpenShift Developer Tools and Services 4.16 ocp-tools-4 1776944215
    fixed: vendor fix RHSA-2026:10214
  • Red Hat OpenShift Developer Tools and Services 4.17 ocp-tools-4 1776944215
    fixed: vendor fix RHSA-2026:10213
  • Red Hat OpenShift Developer Tools and Services 4.18 ocp-tools-4 1776944215
    fixed: vendor fix RHSA-2026:10215
show 4 more
  • Red Hat OpenShift Developer Tools and Services 4.19 ocp-tools-4 1776944215
    fixed: vendor fix RHSA-2026:10206
  • Red Hat OpenShift Developer Tools and Services 4.20 ocp-tools-4 1776944215
    fixed: vendor fix RHSA-2026:10205
  • Red Hat OpenShift Developer Tools and Services 4.21 ocp-tools-4 1776944215
    fixed: vendor fix RHSA-2026:10199
  • Red Hat OpenShift Developer Tools and Services 4.12 ocp-tools-4 1776760341 Red Hat OpenShift Developer Tools and Services 4.13 ocp-tools-4 1776760341 Red Hat OpenShift Developer Tools and Services 4.14 ocp-tools-4 1776760341 Red Hat OpenShift Developer Tools and Services 4.15 ocp-tools-4 1776760341 Red Hat OpenShift Developer Tools and Services 4.16 ocp-tools-4 1776944183 Red Hat OpenShift Developer Tools and Services 4.17 ocp-tools-4 1776944183
    +4 more products
    Red Hat OpenShift Developer Tools and Services 4.18 ocp-tools-4 1776944183 Red Hat OpenShift Developer Tools and Services 4.19 ocp-tools-4 1776944183 Red Hat OpenShift Developer Tools and Services 4.20 ocp-tools-4 1776944183 Red Hat OpenShift Developer Tools and Services 4.21 ocp-tools-4 1776944183
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
8 mo ago

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
GitHub 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
OSV 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
maven org.jenkins-ci.main:jenkins-core
>=2.542, <2.551
<2.541.2
2.551
2.541.2
bitnami jenkins
>=2.483.0, <2.541.2
>=2.542.0, <2.551.0
2.541.2
2.551.0

Affected products

  • Jenkins Project Jenkins

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.