CVE-2026-6335: GitLab · Cross-site Scripting
Affects GitLabSource GCVE Database
Not known to be exploited · CVSS 5.4 Medium · fixed in 18.11.3 : update GitLab when convenient.
Data as of 11 Nov 2026, 23:18 UTC
Thin evidence
One scorer or none| CNA (GitLab) | CVSS 3.1 | 5.4 |
|---|
- Patch
- Available – fixed in 18.11.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 14 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| GitLab GitLab | Affected
| Fixed in– |
AI-suggested
Upgrade GitLab CE/EE to version 18.11.3 or later to apply the official fix for this vulnerability. No other mitigation is indicated by the vendor advisory.
Description
A cross-site scripting (XSS) vulnerability (CWE-79) was found in GitLab CE/EE versions 18.11 prior to 18.11.3. This flaw could allow an authenticated user to execute arbitrary code in another user's browser session due to improper input sanitization. The issue has been remediated in version 18.11.3.