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4.2

ZITADEL: Old Tokens Can Be Used for Authentication

CVE-2026-56664 · published 3 months ago
Summary

A security issue in older versions of ZITADEL's identity management platform allowed attackers to use old authentication tokens, potentially gaining unauthorized access to accounts. This issue is fixed in versions 3.4.12 and 4.15.2. To stay secure, update to the latest version of ZITADEL.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
zitadel zitadel >= 4.0.0-rc.1, < 4.15.2
Original advisory text
ZITADEL is an open source identity management platform. Prior to 3.4.12 and 4.15.2, ZITADEL's external JWT Identity Provider validation in internal/idp/providers/jwt/session.go skips the maximum to...
ZITADEL is an open source identity management platform. Prior to 3.4.12 and 4.15.2, ZITADEL's external JWT Identity Provider validation in internal/idp/providers/jwt/session.go skips the maximum token age freshness check when an incoming token omits the iat claim, allowing arbitrarily old tokens from a trusted issuer to pass authentication. This issue is fixed in versions 3.4.12 and 4.15.2.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
4.2 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-613Insufficient Session Expiration
Timeline
Published10 Jul 2026
Updated4 Nov 2026
First seen10 Jul 2026
Sources
CVE-2026-56664 · NVD
CVE-2026-56664 · MITRE
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