Public proof of conceptFix available

CVE-2023-3364

Q: Is CVE-2023-3364 actively exploited?

A proof-of-concept exploit exists for CVE-2023-3364, but active exploitation has not been confirmed at this time.

Q: What is the CVSS score for CVE-2023-3364?

CVE-2023-3364 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

A public proof of concept exists; no exploitation attested.

Published2023-08-02
Fixed in16.2.2 · 16.1.3 · 16.0.8
WeaknessCWE-1333

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

An issue has been discovered in GitLab CE/EE affecting all versions starting from 8.14 before 16.0.8, all versions starting from 16.1 before 16.1.3, all versions starting from 16.2 before 16.2.2. A Regular Expression Denial of Service was possible via sending crafted payloads which use AutolinkFilter to the preview_markdown endpoint.

Timeline

dates in UTC

2023-08-0200:15CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 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-2023-3364?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-3364?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

GitLab

Branch	Affected	Fixed in	Source
16.2	≥ 16.2, < 16.2.2	16.2.2	NVD
16.2	≥ 16.2.0, < 16.2.2	16.2.2	OSV
16.1	≥ 16.1, < 16.1.3	16.1.3	NVD
16.1	≥ 16.1.0, < 16.1.3	16.1.3	OSV
16.0	≥ 8.14, < 16.0.8	16.0.8	NVD
16.0	≥ 8.14.0, < 16.0.8	16.0.8	OSV

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

Fix

Update GitLab to 16.2.2 · 16.1.3 · 16.0.8

Detection

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

Sources

CISA-ADPSSVC decisionpoc2024-08-30
OpenCVESSVC decisionpoc—
CNACVSS 3.17.5read 2026-10-23
NVDCVSS 3.17.5read 2026-10-23
CNAweakness (CWE)CWE-1333read 2026-10-23
NVDweakness (CWE)CWE-1333read 2026-10-23
FIRST EPSSEPSS score44.5 %read 2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2023-08-02
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-3364?

Is CVE-2023-3364 actively exploited?

A proof-of-concept exploit exists for CVE-2023-3364, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2023-3364?

CVE-2023-3364 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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