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.
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Meta Information
Published
2026-04-08
Last Modified
2026-04-14
Generated
2026-06-16
AI Q&A
2026-04-09
EPSS Evaluated
2026-06-14
NVD
CVE-2026-1092
EUVD
EUVD-2026-20789
Affected Vendors & Products
Showing 6 associated CPEs
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
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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 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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