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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-03-11

Last Modified

2026-03-18

Generated

2026-07-06

AI Q&A

2026-03-11

EPSS Evaluated

2026-07-05

NVD

CVE-2025-12576

EUVD

EUVD-2025-208567

Affected Vendors & Products

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

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 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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