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CVE Vulnerability Details :
CVE-2026-6335
PUBLISHED
More InfoOfficial Page
Assigner-GitLab
Assigner Org ID-ceab7361-8a18-47b1-92ba-4d7d25f6715a
View Known Exploited Vulnerability (KEV) details
Published At-14 May, 2026 | 05:33
Updated At-15 May, 2026 | 09:58
Rejected At-
▼CVE Numbering Authority (CNA)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.11 before 18.11.3 that under certain conditions could have allowed an authenticated user to execute arbitrary code in another user's browser session due to improper sanitization.

Affected Products
Vendor
GitLab Inc.GitLab
Product
GitLab
Repo
git://git@gitlab.com:gitlab-org/gitlab.git
CPEs
  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
Default Status
unaffected
Versions
Affected
  • From 18.11 before 18.11.3 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-79CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Type: CWE
CWE ID: CWE-79
Description: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Metrics
VersionBase scoreBase severityVector
3.15.4MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Version: 3.1
Base score: 5.4
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Upgrade to versions 18.11.3 or above.

Configurations
Workarounds
Exploits
Credits
finder
Thanks [toofikz](https://hackerone.com/toofikz) for reporting this vulnerability through our HackerOne bug bounty program
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://gitlab.com/gitlab-org/gitlab/-/work_items/596760
N/A
https://hackerone.com/reports/3673647
technical-description
exploit
permissions-required
https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/
N/A
Hyperlink: https://gitlab.com/gitlab-org/gitlab/-/work_items/596760
Resource: N/A
Hyperlink: https://hackerone.com/reports/3673647
Resource:
technical-description
exploit
permissions-required
Hyperlink: https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found