CVE-2026-16255

mediumpriority · track · 0OT risk · elevatedEPSS 0.002 · 11 %ileFRNL

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.21% (11th) EPSS

CVSS 5.9 · medium

Is it mine?

1 products

Check your exposure

Who says so?

2 sources

ncsc_nl · certfr

EPSS · scored 2026-10-26

GitLab has remediated an issue in GitLab EE affecting all versions from 12.0 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, when the instance-wide SAML or LDAP membership lock was enabled, an authenticated user could have granted or accepted project and group membership outside the identity provider's control, due to incomplete enforcement of the membership lock on requests created before the lock was enabled.

cvss

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

5.9

010

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

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:Nsecondary · cve@gitlab.comexploitability 1.6 · impact 4.2

v3.15.4mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:Nsecondary · NCSC-NL NL

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-863USprimaryCWE-863US

affected products (1)

Products and version ranges known to be affected.

GitLab GitLab≤ vers:unknown/*ncsc_nlNL

advisories (2)

Vendor and ecosystem advisories describing this.

NCSC-2026-0447Kwetsbaarheden verholpen in GitLab door GitLab Inc.NL2026-10-22csaf · ncsc_nlNL
GitLab heeft 12 kwetsbaarheden verholpen in GitLab Community Edition (CE) en Enterprise Edition (EE). Eén kwetsbaarheid is als kritiek aangemerkt. GitLab heeft een kwetsbaarheid verholpen in GitLab Community Edition en Enterprise Edition binnen de versies vanaf 7.0 tot bepaalde 19.x releases.
CERTFR-2026-AVI-1363Multiples vulnérabilités dans GitLabFrançais2026-10-22vendor · certfrFR

sources

Which sources assert this record, and when.

ncsc_nl certfr NVD CVE.org MITRE

published 2026-10-22modified 2026-10-22

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+4991 more

references (3) nvd

External citations — patches, advisories, analysis.

scry

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