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.

Published 2026-08-05 · last modified 2026-10-24.

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.

EPSS exploit prediction

EPSS: 0.004 (36.2th percentile), scored 2026-11-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Jenkins
Jenkins Project — versions 2.576, 2.568.2

Weakness classification (CWE)

CWE-178 — Improper Handling of Case Sensitivity

References

www.jenkins.io/security/advisory/2026-08-05/ (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.