CVE-2026-57288: Jenkins Active Directory Plugin has an LDAP injection vulnerability

June 24, 2026 (updated September 25, 2026)

In Jenkins Active Directory Plugin 2.41.1 and earlier, the Windows native (ADSI) authentication path does not escape the user name before building the LDAP search filter.

This allows unauthenticated attackers to inject LDAP wildcard characters into the user name, enabling them to enumerate directory user and group names, and to authenticate as a matching user when they know that user’s password but not their exact user name.

Active Directory Plugin 2.41.2 escapes the user name in the Windows native (ADSI) authentication path before building the LDAP search filter.

References

github.com/advisories/GHSA-gx55-p8g7-p3fh
github.com/jenkinsci/active-directory-plugin/commit/5028dea8e0acc45ff9d6be302d4e1cbc1f9da464
github.com/jenkinsci/active-directory-plugin/releases/tag/active-directory-2.41.2
nvd.nist.gov/vuln/detail/CVE-2026-57288
www.jenkins.io/security/advisory/2026-06-24/

Code Behaviors & Features

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