CVE-2023-0921

Name: CVE-2023-0921
Creator: NVD / NIST
Published: 2023-06-06T17:15:12.747+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 84.44%

Last modified Jun 17, 2026

CVE-2023-0921 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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.. EPSS estimates a 84.44% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

EPSS Probability

84.44%

99.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Gitlab	Gitlab	>= 8.3.0, < 15.10.8
Gitlab	Gitlab	>= 15.11.0, < 15.11.7
Gitlab	Gitlab	>= 16.0.0, < 16.0.2

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2023/CVE-2023-0921.jsonVendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/392433Issue Tracking, Vendor Advisory
https://hackerone.com/reports/1869839Permissions Required, Third Party Advisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2023/CVE-2023-0921.jsonVendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/392433Issue Tracking, Vendor Advisory
https://hackerone.com/reports/1869839Permissions Required, Third Party Advisory

Timeline

Published: Jun 6, 2023
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-0921?

How severe is CVE-2023-0921?

CVE-2023-0921 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 84.44% probability of exploitation in the next 30 days.

How do I fix CVE-2023-0921?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-0921?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST