CVE-2026-84671 Path traversal in Jenkins File Parameter Plugin
Attackers can write files to arbitrary locations on the Jenkins controller, leading to remote code execution.
- 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-2026-84671?
CVE-2026-84671 is a high-severity path traversal vulnerability in Jenkins File Parameter 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 File Parameter Plugin 425.v3fa_801681b_5e and earlier allows writing files to arbitrary locations on the Jenkins controller file system through Stapler data binding, which can lead to remote code execution.
Weakness: CWE-22
Which versions are affected by CVE-2026-84671?
How do I fix CVE-2026-84671?
No fix has been published for CVE-2026-84671 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-2026-84671 being exploited?
There is no known exploitation of CVE-2026-84671 in the wild and no public exploit code.
Sources
Also known as GHSA-ch57-mp3q-j35f.