Jenkins <=2.554: Symlink Exploit in tar Extraction
CVE-2026-33001 Published on March 18, 2026

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.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-33001 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
LOCAL
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE
Scope:
CHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Types

What is an insecure temporary file Vulnerability?

The software attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

CVE-2026-33001 has been classified to as an insecure temporary file vulnerability or weakness.

What is a Directory traversal Vulnerability?

The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

CVE-2026-33001 has been classified to as a Directory traversal vulnerability or weakness.


Products Associated with CVE-2026-33001

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2026-33001 are published in these products:

Jenkins
 
Red Hat Ocp Tools
 
Red Hat Rhdh
 

Affected Versions

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 4.21: Red Hat OpenShift Developer Tools and Services 4.2: Red Hat Developer Hub:

Exploit Probability

EPSS
0.75%
Percentile
50.11%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.