CVE-2023-0921

MEDIUM 4.3CVE-2023-0921 · Published 06/06/2023 · updated 17/06/2026

In short

CVE-2023-0921 is a MEDIUM (CVSS 4.3) vulnerability affecting gitlab (gitlab).
Chance of exploitation in the next 30 days (EPSS): 84.4%, higher than 99.7% of all vulnerabilities.
Fix: update to 15.11.7, 16.0.2, 15.10.8 or later.

Package	Affected versions	Patched versions
gitlab gitlab	`≥ 15.11.0, < 15.11.7≥ 16.0.0, < 16.0.2≥ 8.3.0, < 15.10.8`	`15.11.716.0.215.10.8`

Description

A lack of length validation in GitLab CE/EE affecting all versions from 8.3 before 15.10.8, 15.11 before 15.11.7, and 16.0 before 16.0.2 allows an authenticated attacker to create a large Issue description via GraphQL which, when repeatedly requested, saturates CPU usage.

References

gitlab.com/gitlab-org/cves/-/blob/master/2023/CVE-2023-0921.json · Vendor Advisory
gitlab.com/gitlab-org/gitlab/-/issues/392433 · Issue Tracking
hackerone.com/reports/1869839 · Permissions Required

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Package

Affected versions

Patched versions

gitlab

≥ 15.11.0, < 15.11.7≥ 16.0.0, < 16.0.2≥ 8.3.0, < 15.10.8

15.11.716.0.215.10.8

More vulnerabilities in gitlab

See all →