Jenkins Remoting library arbitrary file read vulnerability

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

7.1 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H · score source

EPSS

• CVE-2024-43044: 28.78% estimated exploitation activity in the next 30 days; percentile 98.15 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Jenkins uses the Remoting library (typically agent.jar or remoting.jar) for the communication between controller and agents. This library allows agents to load classes and classloader resources from the controller, so that Java objects sent from the controller (build steps, etc.) can be executed on agents. In addition to individual class and resource files, Remoting also allows Jenkins plugins to transmit entire jar files to agents using the Channel#preloadJar API. As of publication of this advisory, this feature is used by the following plugins distributed by the Jenkins project: bouncycastle API, Groovy, Ivy, TeamConcert In Remoting 3256.v88af6e922152 and earlier, except 3206.3208.v409508a675ff and 3248.3250.v3277a8e88c9b, included in Jenkins 2.470 and earlier, LTS 2.452.3 and earlier, calls to Channel#preloadJar result in the retrieval of files from the controller by the agent using ClassLoaderProxy#fetchJar. Additionally, the implementation of ClassLoaderProxy#fetchJar invoked on…

Published by the source

7 Aug 2024, 15:30 UTC

Last modified by the source

18 Nov 2024, 16:27 UTC

Source last checked

26 Oct 2026, 16:31 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-h856-ffvv-xvr4

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# Patch Next advisory brief: CVE-2024-43044

Advisory: Jenkins Remoting library arbitrary file read vulnerability
IDs: CVE-2024-43044, GHSA-h856-ffvv-xvr4
Record: https://patchnext.com/advisories/cve-2024-43044 (revision 1, source checked 26 Oct 2026, 16:31 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: org.jenkins-ci.main:jenkins-core 2.471, 2.462.1, 2.452.4; org.jenkins-ci.main:remoting 3256.3258, 3248.3250, 3206.3208. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.jenkins-ci.main:jenkins-core: affected < 2.452.4; >= 2.460, < 2.462.1; >= 2.470, < 2.471; fixed in 2.452.4, 2.471, 2.462.1
- Maven org.jenkins-ci.main:remoting: affected < 3206.3208; >= 3248, < 3248.3250; >= 3256, < 3256.3258; fixed in 3206.3208, 3248.3250, 3256.3258

## Suggested inspection (read-only)
- Maven org.jenkins-ci.main:jenkins-core: check the installed version with your package manager.
- Maven org.jenkins-ci.main:remoting: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on org.jenkins-ci.main:jenkins-core, org.jenkins-ci.main:remoting.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-h856-ffvv-xvr4 (GitHub-reviewed advisory GHSA-h856-ffvv-xvr4 lists affected ranges: Maven org.jenkins-ci.main:remoting >=0 =3248 =3256 =0 =2.460 =2.470 <2.471)

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