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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-03-11

Last Modified

2026-03-13

Generated

2026-07-06

AI Q&A

2026-03-11

EPSS Evaluated

2026-07-05

NVD

CVE-2025-14513

EUVD

EUVD-2025-208576

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 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

KEV

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.

Attack-Flow Graph

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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