CVE-2026-55670— ZITADEL: Cross-Tenant User Leakage via Recycled Identifiers
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I. Basic Information for CVE-2026-55670
Vulnerability Information
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Vulnerability Title
ZITADEL: Cross-Tenant User Leakage via Recycled Identifiers
Source: NVD (National Vulnerability Database)
Vulnerability Description
ZITADEL is an open source identity management platform. Prior to 4.15.1, ZITADEL's event store validation can retain the original resource owner for a deleted user identifier, causing a later user recreated with the same identifier in another organization to be provisioned under the original organization and exposed to that organization's administrator. This issue is fixed in version 4.15.2.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
访问控制不恰当
Source: NVD (National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-55670
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-55670 (2)
Vendor Advisories for CVE-2026-55670 (1)
Vendor Pages for CVE-2026-55670 (1)
Same Patch Batch · zitadel · 2026-07-10 · 9 CVEs total
| CVE-2026-56668 | 8.1 HIGH | ZITADEL: Unauthorized Token Privilege Escalation in OAuth2 Token Exchange |
| CVE-2026-55672 | 7.4 HIGH | ZITADEL: Missing client_id binding in OIDC authorization code exchange and refresh token f |
| CVE-2026-56667 | 7.3 HIGH | ZITADEL: Stored XSS via Default URI Redirect in Login V2 |
| CVE-2026-56666 | 4.8 MEDIUM | ZITADEL: Auto-linking by email: IdP-side email verification is not checked |
| CVE-2026-55669 | 4.2 MEDIUM | ZITADEL: Missing Token Audience Validation (`aud`) in JWT IdP Provider |
| CVE-2026-56665 | 4.2 MEDIUM | ZITADEL: Missing Token Expiration (`exp`) Validation in JWT IdP Provider |
| CVE-2026-56664 | 4.2 MEDIUM | ZITADEL: Missing Token Lifecyle Validation (`exp` and `iat`) in JWT IdP Provider |
| CVE-2026-55671 | ZITADEL: Server-Side Request Forgery (SSRF) and Denylist Bypass in Outgoing HTTP Component |
IV. Related Vulnerabilities
Same product: zitadel
- CVE-2026-56668
ZITADEL: Unauthorized Token Privilege Escalation in OAuth2 T - CVE-2026-56666
ZITADEL: Auto-linking by email: IdP-side email verification - CVE-2026-56667
ZITADEL: Stored XSS via Default URI Redirect in Login V2 - CVE-2026-56665
ZITADEL: Missing Token Expiration (`exp`) Validation in JWT - CVE-2026-56664
ZITADEL: Missing Token Lifecyle Validation (`exp` and `iat`)
Same vendor: zitadel
- CVE-2026-56668
ZITADEL: Unauthorized Token Privilege Escalation in OAuth2 T - CVE-2026-56666
ZITADEL: Auto-linking by email: IdP-side email verification - CVE-2026-56667
ZITADEL: Stored XSS via Default URI Redirect in Login V2 - CVE-2026-56665
ZITADEL: Missing Token Expiration (`exp`) Validation in JWT - CVE-2026-56664
ZITADEL: Missing Token Lifecyle Validation (`exp` and `iat`)
Same weakness: CWE-284
- CVE-2026-20744
Hydro-Québec Le Circuit Electrique charging station backend - CVE-2026-56335
Capgo - Channel Configuration Mutation via Write-Scoped API - CVE-2026-15319
Sipeed PicoClaw Launcher access_control.go IPAllowlist acces - CVE-2026-15188
manjurulhoque django-job-portal Employee Dashboard Endpoint - CVE-2026-58525
Microsoft Edge (Chromium-based) Security Feature Bypass Vuln
V. Comments for CVE-2026-55670
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