CVE-2026-10086

GitLab has remediated an issue in GitLab EE affecting all versions from 16.4 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an authenticated user with developer-role permissions to execute arbitrary client-side code in the context of another user's session, due to improper sanitization of user-supplied input.

CVSS v3.1

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

CVSS v3.1

8.7 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

EPSS

0.35% chance of exploitation in the next 30 days, 28th percentile

Published

2026-06-25

Updated

2026-06-26

Proof-of-concept exploits (1)

• https://hackerone.com/reports/3734800

References

• CVE Record
• NVD entry

Related

• CVE-2026-10083
• CVE-2026-10087
• CVE-2026-10082
• CVE-2026-10097
• CVE-2026-10081
• CVE-2026-1010