What is CVE-2026-70428?

CVE-2026-70428 is a medium-severity vulnerability in Jenkins, classified under Path Traversal. CVSS score: 4.3/10. Published 2026-08-05.

How severe is CVE-2026-70428?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Path Traversal in Jenkins

CVE-2026-70428

Jenkins 2.575 and earlier, LTS 2.568.1 and earlier improperly identifies file paths attempting path traversal in file parameter names, allowing attackers with Item/Configure and Item/Build permission to write files to arbitrary locations on the controller file system.

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.003 (25.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Affected products

Jenkins
Jenkins Project — versions 2.576, 2.568.2

Weakness classification (CWE)

CWE-22 — Path Traversal

References

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

Frequently asked questions

What is CVE-2026-70428?: CVE-2026-70428 is a medium-severity vulnerability in Jenkins, classified under Path Traversal. CVSS score: 4.3/10. Published 2026-08-05.
How severe is CVE-2026-70428?: Medium severity. CVSS v3 base score is 4.3 out of 10.