What is the CVSS score of CVE-2026-2973?

CVE-2026-2973 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Gitlab are affected by CVE-2026-2973?

Organizations using GitLab CE/EE affecting all should be aware of moderate risk from CVE-2026-2973, a cross-site scripting vulnerability rated CVSS 5.4.. A patch is available.

Is there a public PoC exploit available for CVE-2026-2973?

Yes, a public proof-of-concept exploit is available for CVE-2026-2973. Prioritise patching immediately. EPSS: 0.0%.

Gitlab CVE-2026-2973

EUVD-2026-15809 MEDIUM

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

2026-03-25 GitLab

XSS Gitlab

5.4

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Patch available

Apr 16, 2026 - 05:29 EUVD

18.10.1,18.9.3,18.8.7

PoC Detected

Mar 26, 2026 - 17:43 vuln.today

Public exploit code

EUVD ID Assigned

Mar 25, 2026 - 16:47 euvd

EUVD-2026-15809

Analysis Generated

Mar 25, 2026 - 16:47 vuln.today

CVE Published

Mar 25, 2026 - 16:34 nvd

MEDIUM 5.4

DescriptionNVD

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.7 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an authenticated user to execute arbitrary JavaScript in a user's browser due to improper sanitization of entity-encoded content in Mermaid diagrams.

AnalysisAI

This vulnerability is a stored cross-site scripting (XSS) flaw in GitLab's Mermaid diagram rendering that allows authenticated users to inject arbitrary JavaScript code into other users' browsers through improperly sanitized entity-encoded content. The vulnerability affects GitLab CE/EE versions 17.7 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1, with a CVSS score of 5.4 (medium severity). …

RemediationAI

Within 30 days: Identify affected systems running GitLab CE/EE affecting all and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

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

Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

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CVE-2026-2973 vulnerability details – vuln.today

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