CVE-2021-39917

mediumpriority · track · 26EPSS 0.014 · 72 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.37% (72nd) EPSS

CVSS 4 · medium

Is it mine?

16 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-26

An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.9 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. A regular expression related to quick actions features was susceptible to catastrophic backtracking that could cause a DOS attack.

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

v2.04mediumAV:N/AC:L/Au:S/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8 · impact 2.9

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)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-697USprimary

affected products (16)

Products and version ranges known to be affected.

Open Source Arch Linuxall versionscert_bundDEcpe:/o:archlinux:archlinux:-
Open Source GitLab <14.3.6all versionscert_bundDE
Open Source GitLab <14.4.4all versionscert_bundDE
Open Source GitLab <14.5.2all versionscert_bundDE
Open Source GitLab< 14.3.6cert_bundDE
Open Source GitLab< 14.4.4cert_bundDE
Open Source GitLab< 14.5.2cert_bundDE
GitLab GitLab12.9, → 14.3.6enisa_euvdEU
GitLab GitLab14.4, → 14.4.4enisa_euvdEU
GitLab GitLab14.5, → 14.5.2enisa_euvdEU
gitlab gitlab12.9.0 → 14.3.6nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
gitlab gitlab14.4.0 → 14.4.4nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
gitlab gitlab14.5.0 → 14.5.2nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
Bitnami gitlab12.9.0 → 14.3.6osvUSpkg:bitnami/gitlab
Bitnami gitlab14.4.0 → 14.4.4osvUSpkg:bitnami/gitlab
Bitnami gitlab14.5.0 → 14.5.2osvUSpkg:bitnami/gitlab

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-0292GitLab: Mehrere SchwachstellenDeutsch2021-12-06csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in GitLab ausnutzen, um seine Privilegien zu erhöhen, Informationen offenzulegen, Sicherheitsvorkehrungen zu umgehen oder einen Denial of Service zu verursachen.
BIT-gitlab-2021-399172024-03-06vendor · osvUS
An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.9 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. A regular expression related to quick actions features was susceptible to catastrophic backtracking that could cause a DOS attack.

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 2021-12-13modified 2026-06-17

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+216 more

references (14)

External citations — patches, advisories, analysis.

scry

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