What is CVE-2026-70427?

CVE-2026-70427 is a medium-severity vulnerability in Jenkins Project, classified under Improper Link Resolution Before File Access. CVSS score: 4.3/10. Published 2026-08-05.

How severe is CVE-2026-70427?

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

Vulnerability in Jenkins Project

CVE-2026-70427

Jenkins 2.575 and earlier, LTS 2.568.1 and earlier does not safely handle symbolic links with effectively empty names during the extraction of `.tar` and `.tar.gz` archives, allowing attackers able to control agent processes to provide cra…

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 Project — versions 2.576, 2.568.2

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

jenkinsci-cert@googlegroups.com (vendor-advisory)

Frequently asked questions

What is CVE-2026-70427?: CVE-2026-70427 is a medium-severity vulnerability in Jenkins Project, classified under Improper Link Resolution Before File Access. CVSS score: 4.3/10. Published 2026-08-05.
How severe is CVE-2026-70427?: Medium severity. CVSS v3 base score is 4.3 out of 10.