CVE-2026-2973

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.

CVSS v3.1

5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS

0.17% chance of exploitation in the next 30 days, 7th percentile

Published

2026-03-25

Updated

2026-03-26

Proof-of-concept exploits (1)

• https://hackerone.com/reports/3566802

References

• CVE Record
• NVD entry

Related

• CVE-2026-2972
• CVE-2026-2974
• CVE-2026-2971
• CVE-2026-2975
• CVE-2026-2970
• CVE-2026-2976