CVE-2026-84645 Code injection in Jenkins
Attackers can achieve remote code execution by submitting malicious config.xml documents that exploit improper handling of nested configuration objects in Jenkins.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-84645?
CVE-2026-84645 is a high-severity code injection vulnerability in Jenkins Jenkins, published on 2 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, objects of types marked as storing their configuration in independent top-level configuration files in Jenkins (such as the global configuration and jobs) can appear as nested field values in user-submitted `config.xml` documents and subsequently handle HTTP requests via Stapler, resulting in remote code execution.
Which versions are affected by CVE-2026-84645?
1 open source package ship an affected version, including jenkins. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
jenkins Bitnami | All versions | 2.568.3, 2.580.0 |
Products include Jenkins Jenkins.
How do I fix CVE-2026-84645?
Upgrade jenkins to a fixed version for your release line: 2.568.3 or 2.580.0.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-84645 being exploited?
There is no known exploitation of CVE-2026-84645 in the wild and no public exploit code.
Other vulnerabilities in Jenkins Jenkins
- CVE-2024-23897 Jenkins Command Line Interface (CLI) Path Traversal
- CVE-2018-1000861 Jenkins Stapler Web Framework Deserialization of Untrusted Data
- CVE-2017-1000353 Jenkins Remote Code Execution
- CVE-2015-5317 Jenkins User Interface (UI) Information Disclosure
- CVE-2021-21690 Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins
Sources
Also known as BIT-jenkins-2026-84645, GHSA-g5fg-fmcm-8xx6, MINI-263h-f586-7ccx, MINI-4q59-jp2m-h43p, MINI-8fj9-v9cm-qf94, MINI-99g3-x9mh-cmmv and 3 more.