CVE-2026-2973

medium

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.7 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an authenticated user to execute arbitrary JavaScript in a user's browser due to improper sanitization of entity-encoded content in Mermaid diagrams.

References

https://about.gitlab.com/releases/2026/03/25/patch-release-gitlab-18-10-1-released/

https://hackerone.com/reports/3566802

https://gitlab.com/gitlab-org/gitlab/-/work_items/591049

Details

Source: Mitre, NVD

Published: 2026-03-25

Updated: 2026-03-26

Risk Information

CVSS v2

Base Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 5.4

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Severity: Medium

EPSS

EPSS: 0.00017