CVE-2026-1092

Received Received - Intake

Denial of Service via JSON Input Validation in GitLab

Publication date: 2026-04-08

Last updated on: 2026-04-14

Assigner: GitLab Inc.

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 12.10 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an unauthenticated user to cause denial of service due to improper input validation of JSON payloads.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-04-08

Last Modified

2026-04-14

Generated

2026-07-06

AI Q&A

2026-04-09

EPSS Evaluated

2026-07-05

NVD

CVE-2026-1092

EUVD

EUVD-2026-20789

Affected Vendors & Products

Vendor	Product	Version / Range
gitlab	gitlab	From 18.9.0 (inc) to 18.9.5 (exc)
gitlab	gitlab	From 18.10.0 (inc) to 18.10.3 (exc)
gitlab	gitlab	From 12.10.0 (inc) to 18.8.9 (exc)
gitlab	gitlab	From 18.10.0 (inc) to 18.10.3 (exc)
gitlab	gitlab	From 18.9.0 (inc) to 18.9.5 (exc)
gitlab	gitlab	From 12.10.0 (inc) to 18.8.9 (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 versions from 12.10 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3. It allows an unauthenticated user to cause a denial of service (DoS) by exploiting improper input validation of JSON payloads.

Impact Analysis

The impact of this vulnerability is a denial of service condition, meaning an attacker who is not authenticated can disrupt the availability of the GitLab service by sending specially crafted JSON payloads that are improperly validated.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade GitLab CE/EE to a fixed version. Specifically, update to version 18.8.9 or later if you are using the 18.8 branch, 18.9.5 or later if you are using the 18.9 branch, or 18.10.3 or later if you are using the 18.10 branch.

These updates address the issue that allowed an unauthenticated user to cause denial of service due to improper input validation of JSON payloads.

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