CVE-2025-59476: Jenkins core Jenkins Has A Log Message Vulnerability

MODERATE
Advisory Identifier: GHSA-qrh5-jg98-cr48
Share
CVSS 5.3
CWE-117 CWE-74
Published
Advisory Summary

CVE-2025-59476 is a MODERATE (CVSS 5.3) jenkins has a log message vulnerability (CWE-117: Improper Output Neutralization for Logs) affecting Jenkins core libraries in the Maven ecosystem. The issue involves jenkins has a log message injection vulnerability. Remediation is available by upgrading affected packages to version 2.516.3, 2.528.

CVE-2025-59476 at a Glance

CVE Identifier CVE-2025-59476
GHSA Identifier GHSA-qrh5-jg98-cr48
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-117: Improper Output Neutralization for Logs
Affected Product Jenkins core
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.3

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

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

How to Fix CVE-2025-59476

To remediate this vulnerability, upgrade all affected Jenkins core 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.main:jenkins-core fixed: 2.516.3 
<dependency>
    <groupId>org.jenkins-ci.main</groupId>
    <artifactId>jenkins-core</artifactId>
    <version>2.516.3</version>
</dependency>
org.jenkins-ci.main:jenkins-core fixed: 2.528 
<dependency>
    <groupId>org.jenkins-ci.main</groupId>
    <artifactId>jenkins-core</artifactId>
    <version>2.528</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.main

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2025-59476, inspect your build dependencies using the Maven Dependency Plugin:

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

Analyze the terminal output to locate any version of Jenkins core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.516.3), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.jenkins-ci.main 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-117: Improper Output Neutralization for Logs, where the product constructs a log message from external input, but it does not neutralize or incorrectly neutralizes special elements when the message is written to a log file. In Jenkins core, 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

In Jenkins 2.527 and earlier, LTS 2.516.2 and earlier, the log formatter that prepares log messages for console output (including `jenkins.log` and equivalent) does not restrict or transform the characters that can be inserted from user-specified content in log messages. This allows attackers able to control log message contents to insert line break characters, followed by forged log messages that may mislead administrators reviewing log output. Jenkins 2.528, LTS 2.516.3 adds an indicator at the beginning of a line that was inserted as part of log message content: `[CR]`, `[LF]`, or `[CRLF]` (representing the kind of line break), followed by `>` .

CVE-2025-59476 Affected Jenkins core Versions

2 component(s)
Fixed Versions:
2.516.32.528
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.main:jenkins-core
maven/org.jenkins-ci.main/jenkins-core
Maven
< 2.516.3
2.516.3
org.jenkins-ci.main:jenkins-core
maven/org.jenkins-ci.main/jenkins-core
Maven
≥ 2.517
< 2.528
2.528

References

NVD — CVE-2025-59476 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-59476
Jenkins core Source Repository REPOSITORY
https://github.com/jenkinsci/jenkins
Jenkins core Security Information SECURITY
https://www.jenkins.io/security/advisory/2025-09-17/#SECURITY-3424
Jenkins core Security Information SECURITY
http://www.openwall.com/lists/oss-security/2025/09/17/1

Frequently Asked Questions

What is CVE-2025-59476?
CVE-2025-59476 is a security vulnerability in Jenkins core involving Jenkins has a log message injection vulnerability under CWE-117: Improper Output Neutralization for Logs.
Which Jenkins core versions are affected?
Affected versions include releases prior to 2.516.3, 2.528 across affected packages: org.jenkins-ci.main:jenkins-core.
What version fixes CVE-2025-59476?
Upgrading to 2.516.3, 2.528 (or the latest patched release for your respective branch) resolves the vulnerability.
Is jenkins-core affected?
Yes, org.jenkins-ci.main:jenkins-core is affected in releases prior to 2.516.3, 2.528. Upgrade your dependency to 2.516.3, 2.528 or later.
What is the CVSS score of CVE-2025-59476?
CVE-2025-59476 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2025-59476?
CVE-2025-59476 is classified under CWE-117: Improper Output Neutralization for Logs (The product constructs a log message from external input, but it does not neutralize or incorrectly neutralizes special elements when the message is written to a log file.).
How can I check Maven dependencies for CVE-2025-59476?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.jenkins-ci.main'. 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-qrh5-jg98-cr48",
  "modified" : "2025-11-05T20:45:10Z",
  "published" : "2025-09-17T15:30:37Z",
  "aliases" : [ "CVE-2025-59476" ],
  "summary" : "Jenkins has a log message injection vulnerability",
  "details" : "In Jenkins 2.527 and earlier, LTS 2.516.2 and earlier, the log formatter that prepares log messages for console output (including `jenkins.log` and equivalent) does not restrict or transform the characters that can be inserted from user-specified content in log messages.\n\nThis allows attackers able to control log message contents to insert line break characters, followed by forged log messages that may mislead administrators reviewing log output.\n\nJenkins 2.528, LTS 2.516.3 adds an indicator at the beginning of a line that was inserted as part of log message content: `[CR]`, `[LF]`, or `[CRLF]` (representing the kind of line break), followed by `>` .",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.main:jenkins-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.516.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.main:jenkins-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.517"
      }, {
        "fixed" : "2.528"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-59476"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/jenkins"
  }, {
    "type" : "WEB",
    "url" : "https://www.jenkins.io/security/advisory/2025-09-17/#SECURITY-3424"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2025/09/17/1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-117", "CWE-74" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-09-17T20:35:34Z",
    "nvd_published_at" : "2025-09-17T14:15:41Z"
  }
}