CVE-2026-16255

MediumCVSS 5.9/10Last modified Oct 22, 2026

Description

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.

Metrics

CVSS 3.1 5.9/10CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N

Weakness enumeration

CWE-863

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
GitLab	GitLab	>= 12.0, < 19.3.6; >= 19.4, < 19.4.3; >= 19.5, < 19.5.1

References

Timeline

Published: Oct 22, 2026
Last modified: Oct 22, 2026
NVD status: Undergoing Analysis

Related CVEs from 2026

CVE-2026-162569.8The POUCO Import Users WordPress plugin through 1.0.0 does not perform any capability or nonce checks on AJAX actions available to unauthent CVE-2026-162578.2The Arvow AI SEO Writer WordPress plugin before 1.5.4 does not properly restrict access to one of its REST endpoints, whose only access cont CVE-2026-162589.8The Ajax Search Lite WordPress plugin before 4.14.5 does not prevent the deserialization of untrusted input, allowing unauthenticated attac CVE-2026-162599.8The Uix UserCenter WordPress plugin through 1.0.3 does not verify that the account being modified through an unauthenticated profile-update CVE-2026-16269.1An attacker may exploit the use of weak CBC-based cipher suites in the device’s SSH service to potentially observe or manipulate parts of th CVE-2026-162606.8The Post Grid, Slider & Carousel Ultimate WordPress plugin before 1.8.1 does not sanitise and escape one of its custom post type settings b CVE-2026-162617.5The login-social WordPress plugin through 1.0.4 does not validate password-reset requests against a reset key or the requester's identity, a CVE-2026-162627.5The Estatik Real Estate Plugin WordPress plugin before 4.3.3 does not bind its OAuth social login flow to the initiating user session, allow CVE-2026-162638.8The WP Maps WordPress plugin before 4.9.7 does not perform a capability check in one of its AJAX actions and does not properly validate a u CVE-2026-162646.5The Newsletters WordPress plugin before 4.18.1 does not perform an ownership check on some of its subscriber management actions, and issues CVE-2026-162656.5The WP Maps WordPress plugin before 4.9.7 does not perform a capability check in one of its AJAX actions and does not restrict the operatio CVE-2026-162664.0Versions of the package mongo-object before 3.0.3 are vulnerable to Prototype Pollution via the expandKey() function in util.js. An attacker