CVE-2026-48919 Jenkins Active Directory Plugin deserializes data from LDAP referrals without validation

What is CVE-2026-48919?

CVE-2026-48919 is a medium-severity unsafe deserialization vulnerability in Jenkins Active Directory Plugin, published on 27 May 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

Jenkins Active Directory Plugin 2.41 and earlier deserializes data from LDAP referrals without validation.

Weakness: CWE-502

Which versions are affected by CVE-2026-48919?

2 open source packages ship an affected version, including org.jenkins-ci.plugins:active-directory. It affects 1 product.

Products include Jenkins Active Directory.

How do I fix CVE-2026-48919?

Upgrade org.jenkins-ci.plugins:active-directory to 2.41.1 or later.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2026-48919 being exploited?

There is no known exploitation of CVE-2026-48919 in the wild and no public exploit code.

Other vulnerabilities in Jenkins Active Directory Plugin

• CVE-2020-2299 Improper Authentication in Jenkins Active Directory Plugin Critical 9.8
• CVE-2020-2300 Improper Authentication (empty password) in Jenkins Active Directory Plugin Critical 9.8
• CVE-2020-2301 Authentication cache in Active Directory Jenkins Plugin allows logging in with any password Critical 9.8
• CVE-2017-2649 Jenkins Active Directory Plugin did not verify certificate of AD server High 8.1
• CVE-2019-1003009 Jenkins Active Directory Plugin Improper certificate validation with StartTLS High 7.4

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-p2gw-f3rv-82mw.