CVE-2026-105206

Medium

Description

ZITADEL 3.0.0 through 3.4.15 and 4.x before 4.17.3 contains an incorrect authorization flaw in the User Service API, which verifies user.read against the caller's organization rather than the organization owning the target user. An authenticated member holding org-scoped user.read can query GET /v2/users/{userId}/authentication_methods to learn which authentication method types users in other organizations have registered.

SeverityMedium

CVSS5.3

Exploit probability—

ProductZitadel

PublishedOct 4, 2026

First seenOct 4, 2026

Weakness typeCWE-863Incorrect authorization

How to fix

Update

zitadel zitadel4.17.3 or later

Vendor advisories

github.com/zitadel/zitadel/security/advisories/GHSA-j344-gqv4-84ff

Affected products

Product	Affected versions	Fixed in
zitadel zitadel	4.0.0 ≤ v < 4.17.3, 3.0.0 ≤ v ≤ 3.4.15	4.17.3

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