CVE-2026-100104
Received Received - Intake

Server-Side Request Forgery in GitLab CE/EE via Race Condition

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: GitLab Inc.

Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.3 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 that, under certain conditions, could have allowed an authenticated user to perform server-side request forgery and reach internal network resources due to a time-of-check to time-of-use race condition in URL validation during repository import operations.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-13
Generated
2026-10-13
AI Q&A
2026-10-13
EPSS Evaluated
N/A
NVD
CVE-2026-100104
EUVD
EUVD-2026-98212

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
GitLab GitLab 10.3
GitLab GitLab 19.3
GitLab GitLab 19.4

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

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Executive Summary

This vulnerability is a server-side request forgery (SSRF) flaw in GitLab CE/EE versions before 19.2.8, 19.3.5, and 19.4.2. It occurs due to a time-of-check to time-of-use race condition during URL validation in repository import operations, allowing an authenticated user to bypass restrictions and access internal network resources.

Impact Analysis

An attacker with authenticated access could exploit this to make unauthorized requests to internal systems, potentially accessing sensitive data or services. This could lead to data breaches, unauthorized modifications, or further network infiltration depending on the internal resources exposed.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR's data protection requirements and HIPAA's safeguards for protected health information. Non-compliance may result in legal penalties, reputational damage, and loss of trust.

Mitigation Strategies

Upgrade GitLab to version 19.4.2, 19.3.5, or 19.2.8 or later immediately to address the vulnerability. Check your current version with 'gitlab-rake gitlab:env:info' and follow the official upgrade guide.

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