What is CVE-2026-57294?

CVE-2026-57294 is a medium-severity vulnerability in Jenkins Ec2_fleet, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-06-24.

How severe is CVE-2026-57294?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Jenkins Ec2_fleet

CVE-2026-57294

A missing permission check in Jenkins EC2 Fleet Plugin 4.2.3.539.v8fedff2a_81c3 and earlier allows attackers with Overall/Read permission to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through ano…

Vulnerability class: Broken Access Control

EPSS: 0.002 (5.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

Affected products

Jenkins Ec2_fleet
Jenkins Project Ec2 Fleet Plugin — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

jenkinsci-cert@googlegroups.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-57294?: CVE-2026-57294 is a medium-severity vulnerability in Jenkins Ec2_fleet, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-06-24.
How severe is CVE-2026-57294?: Medium severity. CVSS v3 base score is 5.4 out of 10.