CVE-2026-15975

Analyzed Analyzed - Analysis Complete

Denial of Service in GitLab CE/EE Due to Insufficient Throttling

Publication date: 2026-07-29

Last updated on: 2026-08-03

Assigner: GitLab Inc.

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.8 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 that under certain conditions could have allowed an unauthenticated user to cause a denial of service due to insufficient resource throttling when processing merge request discussions.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-07-29

Last Modified

2026-08-03

Generated

2026-08-19

AI Q&A

2026-07-30

EPSS Evaluated

2026-08-18

NVD

CVE-2026-15975

Affected Vendors & Products

Vendor	Product	Version / Range
gitlab	gitlab	From 19.1.0 (inc) to 19.1.3 (exc)
gitlab	gitlab	From 19.1.0 (inc) to 19.1.3 (exc)
gitlab	gitlab	19.2.0
gitlab	gitlab	19.2.0
gitlab	gitlab	From 11.8.0 (inc) to 19.0.5 (exc)
gitlab	gitlab	From 11.8.0 (inc) to 19.0.5 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-770	The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

Attack-Flow Graph

Executive Summary

This vulnerability in GitLab CE/EE versions 11.8 to 19.2.0 allows an unauthenticated user to cause a denial of service by exploiting insufficient resource throttling during merge request discussions processing.

Detection Guidance

This vulnerability involves insufficient resource throttling in GitLab when processing merge request discussions, leading to potential denial of service. To detect it, monitor GitLab server logs for unusual spikes in CPU or memory usage during merge request discussions. Check for excessive API calls or database queries related to discussions. Ensure your GitLab instance is updated to version 19.0.5, 19.1.3, or 19.2.1 or later to mitigate the issue.

Impact Analysis

An attacker could exploit this to disrupt GitLab services, making them unavailable to legitimate users. This could lead to downtime, lost productivity, and potential data access issues during outages.

Compliance Impact

This vulnerability could lead to a denial of service due to insufficient resource throttling, which may impact the availability of systems handling sensitive data. However, the provided context does not specify direct implications for GDPR or HIPAA compliance.

Mitigation Strategies

Upgrade GitLab CE/EE to version 19.0.5, 19.1.3, or 19.2.1 or later to address the insufficient resource throttling issue in merge request discussions.

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