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Fencer Vulns
high 8.8

CVE-2026-33001 json

Jenkins has a link following vulnerability allows arbitrary file creation

published 2026-03-18 7 mo ago modified 2026-09-10 59 d ago also BIT-jenkins-2026-33001 , EUVD-2026-12843 , GHSA-r6qv-frpc-q66c

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.1%
EPSS 2.1% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

Jenkins 2.554 and earlier, LTS 2.541.2 and earlier does not safely handle symbolic links during the extraction of .tar and .tar.gz archives, allowing crafted archives to write files to arbitrary locations on the filesystem, restricted only by file system access permissions of the user running Jenkins. This can be exploited to deploy malicious scripts or plugins on the controller by attackers with Item/Configure permission, or able to control agent processes.

Patch / fix

  • maven org.jenkins-ci.main:jenkins-core 2.555
  • bitnami jenkins 2.541.3, 2.555.0
  • Jenkins Project Jenkins 2.555
  • Red Hat OpenShift Developer Tools and Services 4.12 1776764096
  • Red Hat OpenShift Developer Tools and Services 4.13 1776764096
  • Red Hat OpenShift Developer Tools and Services 4.14 1776762347
  • Red Hat OpenShift Developer Tools and Services 4.15 1776762347
  • Red Hat OpenShift Developer Tools and Services 4.16 1776944215
  • Red Hat OpenShift Developer Tools and Services 4.17 1776944215
  • Red Hat OpenShift Developer Tools and Services 4.18 1776944215
  • Red Hat OpenShift Developer Tools and Services 4.19 1776944215
  • Red Hat OpenShift Developer Tools and Services 4.20 1776944215
  • Red Hat OpenShift Developer Tools and Services 4.21 1776944215

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-2026-33001 updated cvss 8.8

jenkins: Jenkins: Arbitrary file write and potential code execution through crafted archives

  • Red Hat OpenShift Developer Tools and Services jenkins
    affected: no fix available
  • Red Hat Developer Hub 1 rhdh/rhdh-hub-rhel9
    affected: no fix planned “Will not fix”
  • 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
show 5 more
  • Red Hat OpenShift Developer Tools and Services 4.18 ocp-tools-4 1776944215
    fixed: vendor fix RHSA-2026:10215
  • 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
total
Assessed
7 mo ago

Exploit prediction

2.11% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA ADP 3.1 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
OSV 3.1 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
maven org.jenkins-ci.main:jenkins-core
<2.555
2.555
bitnami jenkins
<2.541.3
>=2.542.0, <2.555.0
2.541.3
2.555.0

Affected products

  • Jenkins Project Jenkins
  • Red Hat OpenShift Developer Tools and Services 4.12
  • Red Hat OpenShift Developer Tools and Services 4.13
  • Red Hat OpenShift Developer Tools and Services 4.14
  • Red Hat OpenShift Developer Tools and Services 4.15
  • Red Hat OpenShift Developer Tools and Services 4.16
  • Red Hat OpenShift Developer Tools and Services 4.17
  • Red Hat OpenShift Developer Tools and Services 4.18
  • Red Hat OpenShift Developer Tools and Services 4.19
  • Red Hat OpenShift Developer Tools and Services 4.20
  • Red Hat OpenShift Developer Tools and Services 4.21
  • Red Hat Red Hat Developer Hub

Classification

Weakness
  • CWE-59 Improper Link Resolution Before File Access
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory
  • CWE-61 UNIX Symbolic Link (Symlink) Following
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.