CVE-2026-84670 Deserialization in Jenkins Performance Plugin
Attackers with Item/Configure permission can execute arbitrary code on the Jenkins controller via unsafe deserialization of cached performance reports.
- 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-2026-84670?
CVE-2026-84670 is a high-severity unsafe deserialization vulnerability in Jenkins Performance 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 Performance Plugin 1015.v09ca_52b_3370e and earlier does not restrict the classes that can be instantiated when deserializing cached performance reports stored in the build directory on the Jenkins controller, allowing attackers with Item/Configure permission to execute arbitrary code on the Jenkins controller.
Weakness: CWE-502
Which versions are affected by CVE-2026-84670?
How do I fix CVE-2026-84670?
No fix has been published for CVE-2026-84670 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-84670 being exploited?
There is no known exploitation of CVE-2026-84670 in the wild and no public exploit code.
Sources
Also known as GHSA-v45c-jr4p-q7x2.