CVE-2026-10086

HIGH

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 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.

References (3)

Core 3
Core References
Exploit technical-description exploit permissions-required
HackerOne Bug Bounty Report #3734800
https://hackerone.com/reports/3734800

Scores

CVSS v3 8.7
EPSS 0.0023
EPSS Percentile 13.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-79
Status published
Products (5)
gitlab/gitlab 19.1.0
GitLab/GitLab 16.4 - 18.11.6
gitlab/gitlab 16.4.0 - 18.11.6
GitLab/GitLab 19.0 - 19.0.3
GitLab/GitLab 19.1 - 19.1.1
Published Jun 25, 2026
Tracked Since Jun 25, 2026