What is CVE-2026-15217?

CVE-2026-15217 is a high-severity vulnerability in Gitlab, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2026-08-12.

How severe is CVE-2026-15217?

High severity. CVSS v3 base score is 8.7 out of 10.

XSS in Gitlab

CVE-2026-15217

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 19.0.6, 19.1 before 19.1.4, and 19.2 before 19.2.2 that under certain conditions could have allowed cross-site scripting due to improper neutralization…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.

Affected products

Gitlab — versions 18.2, 19.1, 19.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@gitlab.com
cve@gitlab.com (technical-description, permissions-required, exploit)
cve@gitlab.com

Frequently asked questions

What is CVE-2026-15217?: CVE-2026-15217 is a high-severity vulnerability in Gitlab, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2026-08-12.
How severe is CVE-2026-15217?: High severity. CVSS v3 base score is 8.7 out of 10.