What is CVE-2026-19429?

CVE-2026-19429 is a high-severity vulnerability in Jenkins Project, classified under Improper Link Resolution Before File Access. CVSS score: 8.8/10. Published 2026-08-10.

How severe is CVE-2026-19429?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Jenkins Project

CVE-2026-19429

Jenkins FilePath.untarFrom() (all versions) validates symlink destinations but not targets, bypassing CVE-2026-33001. Any user with Item/Build access triggers tar extraction via POST /job/{name}/build, writing persistent symlinks into the…

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Jenkins Project — versions 0

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (third-party-advisory)
309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (vendor-advisory)

Frequently asked questions

What is CVE-2026-19429?: CVE-2026-19429 is a high-severity vulnerability in Jenkins Project, classified under Improper Link Resolution Before File Access. CVSS score: 8.8/10. Published 2026-08-10.
How severe is CVE-2026-19429?: High severity. CVSS v3 base score is 8.8 out of 10.