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Advisory record · GHSA-2x9c-vp3g-hvv2

Jenkins EC2 Fleet Plugin has a cross-site request forgery (CSRF) vulnerability

CVSS 5.4 MediumEPSS 0.0022 · 12th percentile

Published by the GitHub Advisory Database at 24 Jun 2026, 15:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
com.amazon.jenkins.fleet:ec2-fleetMaven<4.2.3.540.va4.2.3.540.va
Identifiers
GHSA-2x9c-vp3g-hvv2 · CVE-2026-57295
Weakness (CWE)
CWE-352
Tags
Published
24 Jun 2026
Updated
25 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Jenkins EC2 Fleet Plugin versions 4.2.3.539.v8fedff2a_81c3 and earlier, as published under the Maven package com.amazon.jenkins.fleet:ec2-fleet, have missing permission checks and do not require POST requests on several form validation endpoints. An attacker with Overall/Read permission who knows credentials IDs can make Jenkins connect to an attacker-specified URL with those credentials and capture stored AWS credentials, and a cross-site request forgery attack is also possible. Upgrade to version 4.2.3.540.va, which requires Overall/Administer permission and POST requests for these actions.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.4 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.0022, the 12th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:16 UTC First seen by agentprime
  2. 31 Oct 2026, 14:16 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.