CVE-2023-3994

highpriority · track · 30EPSS 0.010 · 61 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.96% (61st) EPSS

CVSS 7.5 · high

Is it mine?

9 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-23

An issue has been discovered in GitLab CE/EE affecting all versions starting from 9.3 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 ProjectReferenceFilter to the preview_markdown endpoint.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · cve@gitlab.comexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1333USprimary

affected products (9)

Products and version ranges known to be affected.

GitLab GitLab16.1 → 16.1.3enisa_euvdEU
GitLab GitLab16.2 → 16.2.2enisa_euvdEU
GitLab GitLab9.3 → 16.0.8enisa_euvdEU
gitlab gitlab16.1 → 16.1.3nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
gitlab gitlab16.2 → 16.2.2nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
gitlab gitlab9.3 → 16.0.8nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
Bitnami gitlab16.1.0 → 16.1.3osvUSpkg:bitnami/gitlab
Bitnami gitlab16.2.0 → 16.2.2osvUSpkg:bitnami/gitlab
Bitnami gitlab9.3.0 → 16.0.8osvUSpkg:bitnami/gitlab

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-1945GitLab: Mehrere SchwachstellenDeutsch2023-08-01csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in GitLab ausnutzen, um einen Denial-of-Service-Zustand zu verursachen, einen Cross-Site-Scripting-Angriff durchzuführen, vertrauliche Informationen preiszugeben, Dateien zu manipulieren oder beliebigen Code auszuführen.
BIT-gitlab-2023-3994Inefficient Regular Expression Complexity in GitLab2024-03-06vendor · osvUS
An issue has been discovered in GitLab CE/EE affecting all versions starting from 9.3 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 ProjectReferenceFilter to the preview_markdown endpoint.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv cert_bund NVD CVE.org MITRE

published 2023-08-02modified 2026-06-17

related (600)

Related entries.

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regex is an implementation of regular expressions for the Rust language. The regex crate features built-in mitigations to prevent denial of service attacks caused by untrusted rege…
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An issue was discovered in GitLab CE/EE affecting all versions starting from 16.4 prior to 17.1.7, starting from 17.2 prior to 17.2.5, starting from 17.3 prior to 17.3.2 which cou…
CVE-2021-3749US	high7.5	8.52% (95th)	Exploit	2021-08-31
axios is vulnerable to Inefficient Regular Expression Complexity
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+595 more

references (8)

External citations — patches, advisories, analysis.

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