CVE-2026-48917: Ldap Jenkins LDAP Plugin Deserializes Data Vulnerability

MODERATE
Advisory Identifier: GHSA-x9v8-p946-5pwc
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CVSS 6.6
CWE-502
Published
Advisory Summary

CVE-2026-48917 is a MODERATE (CVSS 6.6) jenkins ldap plugin deserializes data vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Ldap libraries in the Maven ecosystem. The issue involves jenkins ldap plugin deserializes data from ldap referrals without validation. Remediation is available by upgrading affected packages to version 807.809.vd3a.

CVE-2026-48917 at a Glance

CVE Identifier CVE-2026-48917
GHSA Identifier GHSA-x9v8-p946-5pwc
Severity MODERATE
CVSS v3.1 Base Score 6.6
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Ldap
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.6

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required High (PR:H)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-48917

To remediate this vulnerability, upgrade all affected Ldap dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.jenkins-ci.plugins:ldap fixed: 807.809.vd3a 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>ldap</artifactId>
    <version>807.809.vd3a</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.jenkins-ci.plugins

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-48917, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.jenkins-ci.plugins

Analyze the terminal output to locate any version of Ldap in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 807.809.vd3a), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.jenkins-ci.plugins command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Ldap, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Jenkins LDAP Plugin 807.v7d7de30930cf and earlier follows LDAP referrals from the configured LDAP server. These can forward to an RMI URL that causes Jenkins to deserialize attacker-controlled data, resulting in Remote Code Execution (RCE) on the Jenkins controller if deserialization "gadgets" are available on the classpath. This allows attackers able to control the configured LDAP server, or able to perform a machine-in-the-middle attack, to execute code on the Jenkins controller. LDAP Plugin 807.809.vd3a_4e5e4ec98 no longer follows LDAP referrals.

CVE-2026-48917 Affected Ldap Versions

1 component(s)
Fixed Versions:
807.809.vd3a
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:ldap
maven/org.jenkins-ci.plugins/ldap
Maven
< 807.809.vd3a
807.809.vd3a

References

NVD — CVE-2026-48917 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-48917
Ldap Source Repository REPOSITORY
https://github.com/jenkinsci/ldap-plugin
Ldap Security Information SECURITY
https://www.jenkins.io/security/advisory/2026-05-27/#SECURITY-3654

Frequently Asked Questions

What is CVE-2026-48917?
CVE-2026-48917 is a security vulnerability in Ldap involving Jenkins LDAP Plugin deserializes data from LDAP referrals without validation under CWE-502: Deserialization of Untrusted Data.
Which Ldap versions are affected?
Affected versions include releases prior to 807.809.vd3a across affected packages: org.jenkins-ci.plugins:ldap.
What version fixes CVE-2026-48917?
Upgrading to 807.809.vd3a (or the latest patched release for your respective branch) resolves the vulnerability.
Is ldap affected?
Yes, org.jenkins-ci.plugins:ldap is affected in releases prior to 807.809.vd3a. Upgrade your dependency to 807.809.vd3a or later.
What is the CVSS score of CVE-2026-48917?
CVE-2026-48917 has a CVSS v3.1 base score of 6.6 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-48917?
CVE-2026-48917 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check Maven dependencies for CVE-2026-48917?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.jenkins-ci.plugins'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-x9v8-p946-5pwc",
  "modified" : "2026-07-01T19:38:25Z",
  "published" : "2026-05-27T15:33:26Z",
  "aliases" : [ "CVE-2026-48917" ],
  "summary" : "Jenkins LDAP Plugin deserializes data from LDAP referrals without validation",
  "details" : "Jenkins LDAP Plugin 807.v7d7de30930cf and earlier follows LDAP referrals from the configured LDAP server. These can forward to an RMI URL that causes Jenkins to deserialize attacker-controlled data, resulting in Remote Code Execution (RCE) on the Jenkins controller if deserialization \"gadgets\" are available on the classpath.\n\nThis allows attackers able to control the configured LDAP server, or able to perform a machine-in-the-middle attack, to execute code on the Jenkins controller.\n\nLDAP Plugin 807.809.vd3a_4e5e4ec98 no longer follows LDAP referrals.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:ldap"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "807.809.vd3a"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 807.v7d7de30930cf"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-48917"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/ldap-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2026-05-27/#SECURITY-3654"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-01T19:38:25Z",
    "nvd_published_at" : "2026-05-27T15:16:31Z"
  }
}