Insufficient Session Expiration Affecting github.com/zitadel/zitadel/internal/idp/providers/jwt package, versions >=3.0.0 <3.4.12>=4.0.0 <4.15.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMZITADELZITADELINTERNALIDPPROVIDERSJWT-17750666
- published1 Jul 2026
- disclosed18 Jun 2026
- creditUnknown
Introduced: 18 Jun 2026
CVE-2026-56664 (opens in a new tab)How to fix?
Upgrade github.com/zitadel/zitadel/internal/idp/providers/jwt to version 3.4.12, 4.15.2 or higher.
Overview
Affected versions of this package are vulnerable to Insufficient Session Expiration in the JWT validation process. An attacker can maintain persistent unauthorized access by presenting tokens that omit the exp and iat claims, thereby bypassing session expiration and freshness checks. This allows the use of tokens that never expire and are always considered valid by the system.
Workaround
This vulnerability can be mitigated by configuring the external Identity Provider to enforce short token lifetimes and to always include both exp and iat claims in every token payload it issues.