CVE-2026-53441: Jenkins stored XSS in node offline cause description

CVE-2026-53441 · Severity: high · CVSS 8 · Published 2026-06-10

Jenkins, a popular automation server used for software development, contains a security flaw in how it handles descriptions for offline build agents. An attacker with basic configuration permissions can inject malicious scripts that execute in the browsers of other users, potentially leading to unauthorized access or data theft. This could compromise the integrity of the build environment and sensitive credentials stored within the Jenkins interface.

Technologies: org.jenkins-ci.main:jenkins-core (Maven). Vendors: Maven.

Quick answers

Is CVE-2026-53441 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-53441 being exploited in the wild.
How severe is CVE-2026-53441?
High severity, with a CVSS score of 8, published 10 June 2026.
Which products and versions are affected?
org.jenkins-ci.main:jenkins-core (Maven) >= 2.483, <= 2.567, ECOSYSTEM:introduced=2.483,fixed=2.568.
Is there a fix for CVE-2026-53441?
Yes. org.jenkins-ci.main:jenkins-core (Maven): upgrade to 2.568 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-53441 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-53441?
Check whether you run org.jenkins-ci.main:jenkins-core (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • org.jenkins-ci.main:jenkins-core (Maven): upgrade to 2.568 or later
    # set org.jenkins-ci.main:jenkins-core to 2.568 in your pom.xml or build.gradle

Technical details

A stored cross-site scripting (XSS) vulnerability exists in Jenkins 2.483 through 2.567 and LTS 2.492.1 through 2.555.2. The vulnerability is located in the handling of user-provided descriptions for a generic 'offline cause' for build nodes. The root cause is a failure to properly escape input provided via the `POST config.xml` API. An attacker with 'Agent/Configure' permissions can exploit this by submitting a malicious payload that is subsequently rendered in the Jenkins UI for other users. Successful exploitation allows for the execution of arbitrary JavaScript in the context of the victim's browser session. The issue is resolved in Jenkins version 2.568.

Affected products

  • Jenkins Project Jenkins 2.483 through 2.567, LTS 2.492.1 through 2.555.2

Identifiers

  • CVE-2026-53441
  • GHSA-93qh-vwrm-c5pw

Timeline

  • 2026-06-10: advisory: Initial advisory publication
  • 2026-06-10: disclosed
  • 2026-06-12: other: Advisory reviewed and updated

References

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