CVE-2026-84667 Path traversal in Jenkins ThinBackup Plugin
Attackers can overwrite backup configuration to redirect writes and include arbitrary files from the Jenkins controller file system in backups.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-84667?
CVE-2026-84667 is a high-severity path traversal vulnerability in Jenkins ThinBackup Plugin, published on 2 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-84667?
How do I fix CVE-2026-84667?
No fix has been published for CVE-2026-84667 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-84667 being exploited?
There is no known exploitation of CVE-2026-84667 in the wild and no public exploit code.
Sources
Also known as GHSA-mm9g-xfj4-25r6.