Vulnerability-Lookup

CVE-2026-56664 (GCVE-0-2026-56664)

Vulnerability from cvelistv5 – Published: 2026-07-10 17:21 – Updated: 2026-07-10 18:01

Title

ZITADEL: Missing Token Lifecyle Validation (`exp` and `iat`) in JWT IdP Provider

Summary

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.

Severity

4.2 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-10 18:01 UTC

CWE

CWE-613 - Insufficient Session Expiration

Assigner

GitHub_M mitre root

References

5 references

URL	Tags
https://github.com/zitadel/zitadel/security/advis…	x_refsource_CONFIRM
https://github.com/zitadel/zitadel/commit/4925fab…	x_refsource_MISC
https://github.com/zitadel/zitadel/commit/d1c3aa8…	x_refsource_MISC
https://github.com/zitadel/zitadel/releases/tag/v3.4.12	x_refsource_MISC
https://github.com/zitadel/zitadel/releases/tag/v4.15.2	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
zitadel	zitadel	Affected: >= 4.0.0-rc.1, < 4.15.2 Affected: < 3.4.12	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-56664

Vulnerability from fkie_nvd - Published: 2026-07-10 18:16 - Updated: 2026-07-10 19:17

Severity

4.2 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Summary

References

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

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
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      "affectedData": [
        {
          "product": "zitadel",
          "vendor": "zitadel",
          "versions": [
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              "status": "affected",
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GHSA-WXG7-W2V3-W38G

Vulnerability from github – Published: 2026-06-18 13:52 – Updated: 2026-07-18 17:24

Summary

ZITADEL: Missing Token Lifecyle Validation (`exp` and `iat`) in JWT IdP Provider

Details

Summary

A token lifecycle validation vulnerability was discovered in ZITADEL's external JWT Identity Provider (IdP) implementation. ZITADEL enforces a 1-hour maximum token age freshness window (maxAge) calculated from the token's issue time. However, this safety check is guarded by a presence condition. If an incoming token omits the iat claim, the freshness check is entirely bypassed, allowing arbitrarily old tokens to pass authentication successfully.

Per the OIDC Core 1.0 specification, identity token validation pipelines must strictly handle and enforce session expiration. ZITADEL's silent acceptance of tokens missing these temporal constraints compromises session integrity.

Impact

An attacker in possession of a stale token lacking an iat claim can reuse it indefinitely without triggering the maximum age freshness invalidation.

Affected Versions

Systems running one of the following versions are affected:

4.x: 4.0.0 through 4.15.1 (including RC versions)
3.x: 3.0.0 through 3.4.11 (including RC versions)

Patches

The vulnerability has been addressed in the latest releases. ZITADEL now explicitly rejects tokens that lack an iat claim.

4.x: Upgrade to $\ge$ 4.15.2
3.x: Upgrade to $\ge$ 3.4.12

Workarounds

The recommended solution is to update ZITADEL to a patched version.

If an immediate upgrade is not feasible, ensure at the upstream Identity Provider level that your external IdP explicitly includes the iat claim in all signed JWTs.

Publication Note

This advisory covers a subset of the security issues originally published on ZITADEL's registry under this tracking ID. To adhere strictly to CVE formatting standards regarding independently fixable flaws, the original "Token Lifecycle Validation" disclosure has been split into two granular entries. This entry specifically tracks the missing iat claim logic, while a separate companion entry tracks the missing exp claim logic: GHSA-v77h-2w3m-94hx

Questions

If you have any questions or comments about this advisory, please email us at security@zitadel.com

Credits

Thanks to Android-Login-Analysis, Jason Zhou and Pedro Giglioti for reporting this vulnerability.

Severity

4.2 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Show details on source website

JSON

To clipboard

{
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        "ecosystem": "Go",
        "name": "github.com/zitadel/zitadel"
      },
      "ranges": [
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              "fixed": "1.80.0-v2.20.0.20260615122908-fad02c6d9f45"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-56664"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-613"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-18T13:52:21Z",
    "nvd_published_at": "2026-07-10T18:16:23Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nA token lifecycle validation vulnerability was discovered in ZITADEL\u0027s external JWT Identity Provider (IdP) implementation.\nZITADEL enforces a 1-hour maximum token age freshness window (`maxAge`) calculated from the token\u0027s issue time. However, this safety check is guarded by a presence condition. If an incoming token omits the `iat` claim, the freshness check is entirely bypassed, allowing arbitrarily old tokens to pass authentication successfully.\n\nPer the OIDC Core 1.0 specification, identity token validation pipelines must strictly handle and enforce session expiration. ZITADEL\u0027s silent acceptance of tokens missing these temporal constraints compromises session integrity.\n\n### Impact\n\nAn attacker in possession of a stale token lacking an `iat` claim can reuse it indefinitely without triggering the maximum age freshness invalidation.\n\n### Affected Versions\n\nSystems running one of the following versions are affected:\n\n* **4.x**: `4.0.0` through `4.15.1` (including RC versions)\n* **3.x**: `3.0.0` through `3.4.11` (including RC versions)\n\n### Patches\n\nThe vulnerability has been addressed in the latest releases. ZITADEL now explicitly rejects tokens that lack an `iat` claim.\n\n* **4.x**: Upgrade to $\\ge$ [4.15.2](https://github.com/zitadel/zitadel/releases/tag/v4.15.2)\n* **3.x**: Upgrade to $\\ge$ [3.4.12](https://github.com/zitadel/zitadel/releases/tag/v3.4.12)\n\n### Workarounds\n\nThe recommended solution is to update ZITADEL to a patched version.\n\nIf an immediate upgrade is not feasible, ensure at the upstream Identity Provider level that your external IdP explicitly includes the `iat` claim in all signed JWTs.\n\n### Publication Note\n\nThis advisory covers a subset of the security issues originally published on ZITADEL\u0027s registry under this tracking ID. To adhere strictly to CVE formatting standards regarding independently fixable flaws, the original \"Token Lifecycle Validation\" disclosure has been split into two granular entries. This entry specifically tracks the missing `iat` claim logic, while a separate companion entry tracks the missing `exp` claim logic: [GHSA-v77h-2w3m-94hx](https://github.com/zitadel/zitadel/security/advisories/GHSA-v77h-2w3m-94hx)\n\n### Questions\n\nIf you have any questions or comments about this advisory, please email us at [security@zitadel.com](mailto:security@zitadel.com)\n\n### Credits\n\nThanks to [Android-Login-Analysis](https://github.com/Android-Login-Analysis), Jason Zhou and [Pedro Giglioti](https://github.com/Punisher100) for reporting this vulnerability.",
  "id": "GHSA-wxg7-w2v3-w38g",
  "modified": "2026-07-18T17:24:09Z",
  "published": "2026-06-18T13:52:21Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/security/advisories/GHSA-wxg7-w2v3-w38g"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56664"
    },
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/commit/4925fab849d39a88674485d937b79e54318b48a8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/commit/d1c3aa84af8fcb0f33910ada30b866f4afb551ac"
    },
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/commit/fad02c6d9f4587956f830d4536c64a9a94baa7ac"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/zitadel/zitadel"
    },
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/releases/tag/v3.4.12"
    },
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/releases/tag/v4.15.2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": " ZITADEL: Missing Token Lifecyle Validation (`exp` and `iat`) in JWT IdP Provider"
}

Sightings

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Action not permitted

CVE-2026-56664 (GCVE-0-2026-56664)

FKIE_CVE-2026-56664

GHSA-WXG7-W2V3-W38G

Summary

Impact

Affected Versions

Patches

Workarounds

Publication Note

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