What is the CVSS score of CVE-2026-1090?

CVE-2026-1090 has a CVSS 3.1 base score of 8.7 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N. EPSS exploitation probability: 0.0%.

Which versions of Gitlab are affected by CVE-2026-1090?

A critical cross-site scripting (XSS) vulnerability affecting GitLab CE/EE versions 10.6 through 18.7.6 could allow attackers to compromise user sessions and steal sensitive data.

Gitlab CVE-2026-1090

HIGH

Cross-site Scripting (XSS) (CWE-79)

2026-03-11 cve@gitlab.com

XSS Gitlab

8.7

CVSS 3.1

CVSS VectorNVD

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

Analysis Generated

Mar 12, 2026 - 22:06 vuln.today

CVE Published

Mar 11, 2026 - 16:16 nvd

HIGH 8.7

DescriptionNVD

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.

AnalysisAI

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).

RemediationAI

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. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

Full analysis requires sign-in

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CVE-2026-1090 vulnerability details – vuln.today

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