CVE-2025-14513
Received Received - Intake
Denial of Service via JSON Input Validation in GitLab API

Publication date: 2026-03-11

Last updated on: 2026-03-13

Assigner: GitLab Inc.

Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.11 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an unauthenticated user to cause a denial of service condition due to improper input validation when processing specially crafted JSON payloads in the protected branches API.
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Meta Information
Published
2026-03-11
Last Modified
2026-03-13
Generated
2026-06-16
AI Q&A
2026-03-11
EPSS Evaluated
2026-06-15
NVD
CVE-2025-14513
EUVD
EUVD-2025-208576
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 16.11.0 (inc) to 18.7.6 (exc)
gitlab gitlab From 16.11.0 (inc) to 18.7.6 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-1284 The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.
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Executive Summary

This vulnerability in GitLab CE/EE affects multiple versions before certain fixed releases. It allows an unauthenticated user to cause a denial of service (DoS) condition by sending specially crafted JSON payloads to the protected branches API. The issue arises due to improper input validation when processing these payloads.

Impact Analysis

The vulnerability can impact you by allowing an attacker who is not authenticated to disrupt the availability of your GitLab service. Specifically, it can cause a denial of service condition, potentially making the protected branches API or the GitLab instance unavailable or unstable.

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 16.11 to 18.7 series, 18.8.6 or later if you are using the 18.8 series, or 18.9.2 or later if you are using the 18.9 series.

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