CVE-2026-70429 [HIGH] – Jenkins 2.575 and earlier, LTS 2.568.1 and earlier handles case-insensitivity in user name

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.