Denial of Service Vulnerability in GitLab CE/EE
CVE-2026-0958

7.5HIGH

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
11 February 2026

What is CVE-2026-0958?

A vulnerability in GitLab CE/EE could permit an unauthenticated attacker to exploit JSON validation middleware, leading to denial of service through excessive memory or CPU resource consumption. This issue affects several versions of the product, making it critical for users to update to secure releases to mitigate these risks.

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Deploy the Patch

Affected Version(s)

GitLab 18.4 < 18.6.6

GitLab 18.7 < 18.7.4

GitLab 18.8 < 18.8.4

References

https://gitlab.com/gitlab-org/gitlab/-/issues/586202
issue-trackingpermissions-required
https://hackerone.com/reports/3463363
technical-descriptionexploitpermissions-required
https://about.gitlab.com/releases/2026/02/10/patch-releas...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Thanks [elbo7](https://hackerone.com/elbo7) for reporting this vulnerability through our HackerOne bug bounty program
JSON
.