CVE-2023-6680

highpriority · track · 32EPSS 0.004 · 31 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.38% (31st) EPSS

CVSS 8.1 · high

Is it mine?

12 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

An improper certificate validation issue in Smartcard authentication in GitLab EE affecting all versions from 11.6 prior to 16.4.4, 16.5 prior to 16.5.4, and 16.6 prior to 16.6.2 allows an attacker to authenticate as another user given their public key if they use Smartcard authentication. Smartcard authentication is an experimental feature and has to be manually enabled by an administrator.

cvss

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

8.1

010

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

v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.2 · impact 5.9

v3.18.1highAV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · cve@gitlab.comexploitability 2.2 · impact 5.2

v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-295USprimaryCWE-295US

affected products (12)

Products and version ranges known to be affected.

GitLab GitLab11.6 → 16.4.4enisa_euvdEU
GitLab GitLab16.5 → 16.5.4enisa_euvdEU
GitLab GitLab16.6 → 16.6.2enisa_euvdEU
GitLab Inc. Gitlab11.6 → 16.4.4fstec_bduRU
GitLab Inc. Gitlab16.5 → 16.5.4fstec_bduRU
GitLab Inc. Gitlab16.6 → 16.6.2fstec_bduRU
gitlab gitlab11.6 → 16.4.4nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
gitlab gitlab16.5 → 16.5.4nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
gitlab gitlab16.6 → 16.6.2nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
Bitnami gitlab11.6.0 → 16.4.4osvUSpkg:bitnami/gitlab
Bitnami gitlab16.5.0 → 16.5.4osvUSpkg:bitnami/gitlab
Bitnami gitlab16.6.0 → 16.6.2osvUSpkg:bitnami/gitlab

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-3153GitLab: Mehrere SchwachstellenDeutsch2023-12-13csaf · cert_bundDE
Ein entfernter, authentisierter oder anonymer Angreifer kann mehrere Schwachstellen in GitLab ausnutzen, um seine Privilegien zu erweitern, einen Denial of Service zu verursachen, falsche Informationen darzustellen und Sicherheitsvorkehrungen zu umgehen.
BIT-gitlab-2023-6680Improper Certificate Validation in GitLab2024-03-06vendor · osvUS
An improper certificate validation issue in Smartcard authentication in GitLab EE affecting all versions from 11.6 prior to 16.4.4, 16.5 prior to 16.5.4, and 16.6 prior to 16.6.2 allows an attacker to authenticate as another user given their public key if they use Smartcard authentication. Smartcard authentication is an experimental feature and has to be manually enabled by an administrator.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd osv cert_bund NVD CVE.org MITRE

published 2023-12-15modified 2026-06-17

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+1889 more

references (5)

External citations — patches, advisories, analysis.

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