CVE-2026-84656 Missing authorization in Jenkins
Attackers with basic read permissions can view sensitive build parameters of unauthorized jobs 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-2026-84656?
CVE-2026-84656 is a medium-severity missing authorization 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
A missing permission check in Jenkins 2.579 and earlier, LTS 2.568.2 and earlier allows attackers with Item/Read permission on at least one job to read build parameter names and values of jobs they have no access to.
Weakness: CWE-862
Which versions are affected by CVE-2026-84656?
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-2026-84656?
Upgrade jenkins to a fixed version for your release line: 2.568.3 or 2.580.0.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-84656 being exploited?
There is no known exploitation of CVE-2026-84656 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-2026-84656, GHSA-9v33-56f7-qg5c, MINI-6mxf-xc47-xqwv, MINI-h48h-f224-wr22, MINI-h97w-4ffw-q3g9, MINI-jw3x-652j-6fcv and 3 more.