What is CVE-2026-70429?

CVE-2026-70429 is a medium-severity vulnerability in Jenkins, classified under Improper Handling of Case Sensitivity. CVSS score: 6.5/10. Published 2026-08-05.

How severe is CVE-2026-70429?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Jenkins

CVE-2026-70429

Jenkins 2.575 and earlier, LTS 2.568.1 and earlier handles case-insensitivity in user names and group names inconsistently, allowing attackers able to create new users or groups with names that case-insensitively match other characters to impersonate other users or be granted their permissions in some circumstances.

EPSS: 0.002 (15.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.

Affected products

Jenkins
Jenkins Project — versions 2.576, 2.568.2

Weakness classification (CWE)

CWE-178 — Improper Handling of Case Sensitivity

References

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

Frequently asked questions

What is CVE-2026-70429?: CVE-2026-70429 is a medium-severity vulnerability in Jenkins, classified under Improper Handling of Case Sensitivity. CVSS score: 6.5/10. Published 2026-08-05.
How severe is CVE-2026-70429?: Medium severity. CVSS v3 base score is 6.5 out of 10.