Jenkins ThinBackup Plugin <2.1.4: Config Overwrite via Stapler
CVE-2026-84667 Published on September 2, 2026
Jenkins ThinBackup Plugin 2.1.4 and earlier allows overwriting the plugin's backup configuration through Stapler data binding, allowing attackers to redirect backup writes to an attacker-specified directory and to include arbitrary files from the Jenkins controller file system in backups.
Vulnerability Analysis
CVE-2026-84667 can be exploited with network 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 have a high impact on confidentiality, with no impact on integrity, and no impact on availability.
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-2026-84667 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2026-84667
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Affected Versions
Jenkins Project Jenkins ThinBackup Plugin:- Before and including 2.1.4 is affected.