CVE-2026-10086 PUBLISHED

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

Assigner: GitLab
Reserved: 29.05.2026 Published: 25.06.2026 Updated: 25.06.2026

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.

Metrics

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

Product Status

Vendor GitLab
Product GitLab
Versions Default: unaffected
  • affected from 16.4 to 18.11.6 (excl.)
  • affected from 19.0 to 19.0.3 (excl.)
  • affected from 19.1 to 19.1.1 (excl.)

Solutions

Upgrade to versions 18.11.6, 19.0.3, 19.1.1 or above.

Credits

  • Thanks [yvvdwf](https://hackerone.com/yvvdwf) for reporting this vulnerability through our HackerOne bug bounty program finder

References

Problem Types

  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE