CVE-2026-1090

HIGH
2026-03-11 [email protected]
8.7
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:06 vuln.today
CVE Published
Mar 11, 2026 - 16:16 nvd
HIGH 8.7

Tags

Gitlab XSS

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.6 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user, when the `markdown_placeholders` feature flag was enabled, to inject JavaScript in a browser due to improper sanitization of placeholder content in markdown processing.

Analysis

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.6 versions up to 18.7.6 is affected by cross-site scripting (xss) (CVSS 8.7).

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Remediation

Within 24 hours: Identify all GitLab instances in your environment and confirm their version numbers; implement network access restrictions to GitLab if possible. Within 7 days: Deploy a Web Application Firewall (WAF) with XSS protection rules; disable or restrict access to affected GitLab features if operationally feasible; enable multi-factor authentication organization-wide. …

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Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +44
POC: 0

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CVE-2026-1090 vulnerability details – vuln.today
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