CVE-2026-0958

Analyzed Analyzed - Analysis Complete

Denial of Service via JSON Validation Bypass in GitLab

Publication date: 2026-02-11

Last updated on: 2026-02-13

Assigner: GitLab Inc.

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.4 before 18.6.6, 18.7 before 18.7.4, and 18.8 before 18.8.4 that could have allowed an unauthenticated user to cause denial of service through memory or CPU exhaustion by bypassing JSON validation middleware limits.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-02-11

Last Modified

2026-02-13

Generated

2026-07-06

AI Q&A

2026-02-11

EPSS Evaluated

2026-07-05

NVD

CVE-2026-0958

EUVD

EUVD-2026-7060

Affected Vendors & Products

Vendor	Product	Version / Range
gitlab	gitlab	From 18.7.0 (inc) to 18.7.4 (exc)
gitlab	gitlab	From 18.8.0 (inc) to 18.8.4 (exc)
gitlab	gitlab	From 18.7.0 (inc) to 18.7.4 (exc)
gitlab	gitlab	From 18.8.0 (inc) to 18.8.4 (exc)
gitlab	gitlab	From 18.4.0 (inc) to 18.6.6 (exc)
gitlab	gitlab	From 18.4.0 (inc) to 18.6.6 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-436	Product A handles inputs or steps differently than Product B, which causes A to perform incorrect actions based on its perception of B's state.

Attack-Flow Graph

Executive Summary

This vulnerability in GitLab CE/EE affects versions from 18.4 before 18.6.6, 18.7 before 18.7.4, and 18.8 before 18.8.4. It allows an unauthenticated user to bypass JSON validation middleware limits, which can lead to denial of service by exhausting memory or CPU resources.

Impact Analysis

The impact of this vulnerability is a denial of service condition. An attacker who is not authenticated can exploit it to consume excessive memory or CPU resources on the affected GitLab server, potentially causing the service to become unavailable.

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 18.6.6 or later if you are using the 18.4 to 18.6 series, version 18.7.4 or later if you are using the 18.7 series, or version 18.8.4 or later if you are using the 18.8 series.

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