CVE-2026-70429 Auth bypass in Jenkins
Attackers can impersonate users or gain permissions by creating accounts with case-insensitive name matches due to inconsistent handling.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-70429?
CVE-2026-70429 is a high-severity authentication bypass vulnerability in Jenkins Jenkins, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Jenkins 2.575 and earlier, LTS 2.568.1 and earlier handles case-insensitivity in user names and group names inconsistently, allowing attackers able to create new users or groups with names that case-insensitively match other characters to impersonate other users or be granted their permissions in some circumstances.
Weakness: CWE-178
Which versions are affected by CVE-2026-70429?
1 open source package ship an affected version, including jenkins. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
jenkins Bitnami | All versions | 2.568.2, 2.576.0 |
Products include Jenkins Jenkins.
How do I fix CVE-2026-70429?
Upgrade jenkins to a fixed version for your release line: 2.568.2 or 2.576.0.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-70429 being exploited?
There is no known exploitation of CVE-2026-70429 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-2026-70429, GHSA-7fgq-gph8-29q5, MINI-3r9f-995f-2q47, MINI-5qf3-pjqr-257j, MINI-7rq8-f444-vgvc, MINI-9rf9-f67v-c3g2 and 4 more.