CVE-2025-12576
Received Received - Intake
Denial of Service in GitLab Webhook Response Handling

Publication date: 2026-03-11

Last updated on: 2026-03-18

Assigner: GitLab Inc.

Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 9.3 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that under certain conditions could have allowed an authenticated user to cause a denial of service due to improper handling of webhook response data.
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Meta Information
Published
2026-03-11
Last Modified
2026-03-18
Generated
2026-06-16
AI Q&A
2026-03-11
EPSS Evaluated
2026-06-15
NVD
CVE-2025-12576
EUVD
EUVD-2025-208567
Affected Vendors & Products
Showing 6 associated CPEs
Vendor Product Version / Range
gitlab gitlab From 18.8.0 (inc) to 18.8.6 (exc)
gitlab gitlab From 18.9.0 (inc) to 18.9.2 (exc)
gitlab gitlab From 18.8.0 (inc) to 18.8.6 (exc)
gitlab gitlab From 18.9.0 (inc) to 18.9.2 (exc)
gitlab gitlab From 9.3.0 (inc) to 18.7.6 (exc)
gitlab gitlab From 9.3.0 (inc) to 18.7.6 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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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.
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Executive Summary

This vulnerability in GitLab CE/EE affects versions from 9.3 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2. Under certain conditions, it allows an authenticated user to cause a denial of service due to improper handling of webhook response data.

Impact Analysis

The vulnerability can lead to a denial of service (DoS) condition, meaning that an authenticated user could disrupt the normal operation of the GitLab service by exploiting improper handling of webhook response data.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability, you should upgrade GitLab CE/EE to a fixed version. Specifically, update to version 18.7.6 or later if you are using the 18.7 series, 18.8.6 or later if using the 18.8 series, or 18.9.2 or later if using the 18.9 series. These versions contain the fix for the denial of service issue caused by improper handling of webhook response data.

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