Impact Analysis

This vulnerability can lead to Remote Code Execution (RCE) on the Jenkins controller if exploitable deserialization gadgets are present on the classpath.

An attacker can exploit this by controlling the configured LDAP server or performing a man-in-the-middle attack to manipulate LDAP referrals to forward to a malicious RMI URL.

Successful exploitation allows the attacker to execute arbitrary code remotely, potentially compromising the Jenkins environment.

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Executive Summary

This vulnerability involves the Jenkins LDAP Plugin version 807.v7d7de30930cf and earlier, which follows LDAP referrals.

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Detection Guidance

This vulnerability involves the Jenkins LDAP Plugin following LDAP referrals automatically, which can be exploited if an attacker controls the LDAP server or performs a man-in-the-middle attack.

To detect if your system is vulnerable, first verify the version of the Jenkins LDAP Plugin installed. Versions 807.v7d7de30930cf and earlier are affected.

You can check the installed plugin version on your Jenkins server by running the following command on the Jenkins server machine:

• curl -sSL http://your-jenkins-server/pluginManager/api/json?depth=1 | jq '.plugins[] | select(.shortName=="ldap") | .version'

Additionally, monitoring network traffic for unexpected LDAP referral responses or suspicious RMI URLs in LDAP referrals could help detect exploitation attempts.

Since the vulnerability requires control over the LDAP server or a man-in-the-middle position, inspecting LDAP server configurations and network traffic logs for unusual referral behavior is recommended.

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Mitigation Strategies

The immediate mitigation step is to upgrade the Jenkins LDAP Plugin to version 807.809.vd3a_4e5e4ec98 or later, which disables automatic following of LDAP referrals by default.

If upgrading immediately is not possible, consider disabling LDAP referrals manually in the plugin configuration to prevent automatic following.

Additionally, ensure that your LDAP server is secure and not susceptible to being controlled by an attacker, and protect your network against man-in-the-middle attacks.

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Compliance Impact

The provided information does not specify how CVE-2026-48916 affects compliance with common standards and regulations such as GDPR or HIPAA.

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