CVE-2023-3909

mediumpriority · track · 26EPSS 0.006 · 48 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.60% (48th) EPSS

CVSS 6.5 · medium

Is it mine?

15 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-23

An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.3 before 16.3.6, all versions starting from 16.4 before 16.4.2, all versions starting from 16.5 before 16.5.1. A Regular Expression Denial of Service was possible by adding a large string in timeout input in gitlab-ci.yml file.

cvss

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

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Lsecondary · ENISA EU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Lsecondary · cve@gitlab.comexploitability 2.8 · impact 1.4

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/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.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1333USprimary

affected products (15)

Products and version ranges known to be affected.

Open Source GitLab <16.3.6all versionscert_bundDE
Open Source GitLab <16.4.2all versionscert_bundDE
Open Source GitLab <16.5.1all versionscert_bundDE
Open Source GitLab< 16.3.6cert_bundDE
Open Source GitLab< 16.4.2cert_bundDE
Open Source GitLab< 16.5.1cert_bundDE
GitLab GitLab12.3 → 16.3.6enisa_euvdEU
GitLab GitLab16.4 → 16.4.2enisa_euvdEU
GitLab GitLab16.5 → 16.5.1enisa_euvdEU
gitlab gitlab12.3.0 → 16.3.6nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
gitlab gitlab16.4.0 → 16.4.2nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
gitlab gitlab= 16.5.0nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
Bitnami gitlab12.3.0 → 16.3.6osvUSpkg:bitnami/gitlab
Bitnami gitlab16.4.0 → 16.4.2osvUSpkg:bitnami/gitlab
Bitnami gitlab16.5.0 → 16.5.1osvUSpkg:bitnami/gitlab

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-2788GitLab: Mehrere SchwachstellenDeutsch2023-10-31csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in GitLab ausnutzen, um einen Denial of Service Angriff durchzuführen und Informationen offenzulegen.
BIT-gitlab-2023-3909Inefficient Regular Expression Complexity in GitLab2024-03-06vendor · osvUS
An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.3 before 16.3.6, all versions starting from 16.4 before 16.4.2, all versions starting from 16.5 before 16.5.1. A Regular Expression Denial of Service was possible by adding a large string in timeout input in gitlab-ci.yml file.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd osv NVD CVE.org MITRE

published 2023-11-06modified 2026-06-17

related (600)

Related entries.

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+595 more

references (9)

External citations — patches, advisories, analysis.

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