Medium · published August 5, 2026
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.
| Product | Versions | Fixed in |
|---|---|---|
| jenkins/jenkins | < 2.568.2 | 2.568.2 |
| jenkins/jenkins | < 2.576 | 2.576 |