CVE-2026-84668 Auth bypass in Jenkins SAML Plugin
Attackers can overwrite SAML metadata to authenticate as any user, requiring an upgrade of the Jenkins SAML Plugin.
- 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-2026-84668?
CVE-2026-84668 is a high-severity authentication bypass vulnerability in Jenkins SAML 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 SAML Plugin 4.618.v441a_27fa_46d2 and earlier allows overwriting the SAML identity provider metadata file through Stapler data binding, allowing attackers to replace it with attacker-controlled content and authenticate as any user.
Weakness: CWE-284
Which versions are affected by CVE-2026-84668?
How do I fix CVE-2026-84668?
No fix has been published for CVE-2026-84668 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-84668 being exploited?
There is no known exploitation of CVE-2026-84668 in the wild and no public exploit code.
Sources
Also known as GHSA-wv4g-ffg7-rqq4.