CVE-2026-2973

MEDIUM

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

Title source: cna
STIX 2.1

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 (3)

Core 3

Scores

CVSS v3 5.4
EPSS 0.0004
EPSS Percentile 10.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (5)
gitlab/gitlab 18.10.0 (2 CPE variants)
GitLab/GitLab 17.7 - 18.8.7
gitlab/gitlab 17.7.0 - 18.8.7 (2 CPE variants)
GitLab/GitLab 18.10 - 18.10.1
GitLab/GitLab 18.9 - 18.9.3
Published Mar 25, 2026
Tracked Since Mar 25, 2026