CVE-2025-59476 Jenkins has a log message injection vulnerability

What is CVE-2025-59476?

CVE-2025-59476 is a medium-severity vulnerability in Jenkins Jenkins, published on 17 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Jenkins 2.527 and earlier, LTS 2.516.2 and earlier does not restrict or transform the characters that can be inserted from user-specified content in log messages, allowing attackers able to control log message contents to insert line break characters, followed by forged log messages that may mislead administrators reviewing log output.

Weakness: CWE-117

Which versions are affected by CVE-2025-59476?

5 open source packages ship an affected version, including org.jenkins-ci.main:jenkins-core and jenkins. It affects 1 product.

Products include Jenkins Jenkins.

How do I fix CVE-2025-59476?

Upgrade org.jenkins-ci.main:jenkins-core to a fixed version for your release line: 2.516.3 or 2.528.

Is CVE-2025-59476 being exploited?

There is no known exploitation of CVE-2025-59476 in the wild and no public exploit code.

Other vulnerabilities in Jenkins Jenkins

• CVE-2024-23897 Jenkins Command Line Interface (CLI) Path Traversal Exploited Critical 9.8
• CVE-2018-1000861 Jenkins Stapler Web Framework Deserialization of Untrusted Data Exploited Critical 9.8
• CVE-2017-1000353 Jenkins Remote Code Execution Exploited Critical 9.8
• CVE-2015-5317 Jenkins User Interface (UI) Information Disclosure Exploited High 7.5
• CVE-2021-21690 Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins Critical 9.8

All Jenkins Jenkins vulnerabilities

Sources

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

Also known as BIT-jenkins-2025-59476, GHSA-qrh5-jg98-cr48, MINI-3f26-v58r-fwj3, MINI-qj5p-v93h-67jx, MINI-xxvm-8mq7-pj7v.