Jenkins Credentials Binding Plugin filename sanitization flaw leads to RCE
CVE-2026-42520 Published on April 29, 2026
Jenkins Credentials Binding Plugin 719.v80e905ef14eb_ and earlier does not sanitize file names for file and zip file credentials, allowing attackers able to provide credentials to a job to write files to arbitrary locations on the node filesystem, which can lead to remote code execution if Jenkins is configured to allow a low-privileged user to configure file or zip file credentials used for a job running on the built-in node.
Vulnerability Analysis
CVE-2026-42520 is exploitable with network access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
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-2026-42520 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2026-42520
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Affected Versions
Jenkins Project Jenkins Credentials Binding Plugin:- Before and including 719.v80e905ef14eb_ is affected.