No exploitation reportedFix available

CVE-2023-0921

Q: Is CVE-2023-0921 actively exploited?

Active exploitation of CVE-2023-0921 has not been confirmed. Its EPSS score was 84.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2023-0921?

CVE-2023-0921 has a CVSS v3 base score of 4.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

No exploitation reported by the sources we read.

Published2023-06-06
Fixed in16.0.2 · 15.11.7 · 15.10.8
WeaknessCWE-770

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2023-06-0617:15CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-0921?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-0921?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

GitLab

Branch	Affected	Fixed in	Source
16.0	≥ 16.0.0, < 16.0.2	16.0.2	NVD
15.11	≥ 15.11.0, < 15.11.7	15.11.7	NVD
15.10	≥ 8.3.0, < 15.10.8	15.10.8	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update GitLab to 16.0.2 · 15.11.7 · 15.10.8

Advisories and patches

gitlab.comVendor Advisory
gitlab.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2025-01-07
OpenCVESSVC decisionnone—
CNACVSS 3.14.3read 2026-10-23
NVDCVSS 3.14.3read 2026-10-23
CNAweakness (CWE)CWE-770read 2026-10-23
NVDweakness (CWE)CWE-770read 2026-10-23
FIRST EPSSEPSS score84.4 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Published: 2023-06-06
Last Modified: 2026-06-17
NVD status: Analyzed

Frequently asked questions

What is CVE-2023-0921?

Is CVE-2023-0921 actively exploited?

Active exploitation of CVE-2023-0921 has not been confirmed. Its EPSS score was 84.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-0921?

CVE-2023-0921 has a CVSS v3 base score of 4.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

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