Vulnerability-Lookup

CVE-2026-56665 (GCVE-0-2026-56665)

Vulnerability from cvelistv5 – Published: 2026-07-10 17:22 – Updated: 2026-07-10 18:17

Title

ZITADEL: Missing Token Expiration (`exp`) Validation in JWT IdP Provider

Summary

ZITADEL is an open source identity management platform. Prior to 3.4.12 and 4.15.2, ZITADEL is an open source identity management platform. From 3.0.0-rc.1 through 3.4.11 and from 4.0.0-rc.1 through 4.15.1, ZITADEL's external JWT Identity Provider validation in internal/idp/providers/jwt/session.go skips expiration handling when an incoming token omits the exp claim, allowing a token from a trusted issuer to be treated as valid without an automatic expiration window. 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 18:17 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-2026-56665

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-v77h-2w3m-94hx

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "zitadel",
          "vendor": "zitadel",
          "versions": [
            {
              "status": "affected",
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GHSA-V77H-2W3M-94HX

Vulnerability from github – Published: 2026-09-11 21:32 – Updated: 2026-09-11 21:32

Summary

ZITADEL: Missing Token Expiration (`exp`) Validation in JWT IdP Provider

Details

Summary

A token lifecycle validation vulnerability was discovered in ZITADEL's external JWT Identity Provider (IdP) implementation Specifically, within the validation pipeline, if an incoming JWT omits the exp claim entirely, the expiration block is silently skipped rather than rejected. The token is treated as valid forever.

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 token lacking an exp claim holds a permanent credential with no automatic expiration or revocation window.

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 exp 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 an external IdP explicitly includes the exp claim in all signed JWTs.

Publication Note

This issue was originally disclosed as part of a unified security bulletin published under GHSA-wxg7-w2v3-w38g. To satisfy CVE Numbering Authority regulations regarding independently fixable logic flaws, the missing token expiration validation (exp) has been moved into this separate tracking entry so a distinct CVE ID can be correctly mapped to it.

Questions

If there are any questions or comments about this advisory, send an email to security@zitadel.com

Credits

ZITADEL thanks 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

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/zitadel/zitadel"
      },
      "ranges": [
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          "type": "ECOSYSTEM"
        }
      ]
    },
    {
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        "name": "github.com/zitadel/zitadel"
      },
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            },
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            }
          ],
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        }
      ]
    }
  ],
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    "CVE-2026-56665"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-613"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-11T21:32:14Z",
    "nvd_published_at": "2026-07-10T18:16:24Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nA token lifecycle validation vulnerability was discovered in ZITADEL\u0027s external JWT Identity Provider (IdP) implementation\nSpecifically, within the validation pipeline, if an incoming JWT omits the `exp` claim entirely, the expiration block is silently skipped rather than rejected. The token is treated as valid forever.\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 token lacking an `exp` claim holds a permanent credential with no automatic expiration or revocation window.\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 `exp` 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 an external IdP explicitly includes the `exp` claim in all signed JWTs.\n\n### Publication Note\n\nThis issue was originally disclosed as part of a unified security bulletin published under [GHSA-wxg7-w2v3-w38g](https://github.com/zitadel/zitadel/security/advisories/GHSA-wxg7-w2v3-w38g). To satisfy CVE Numbering Authority regulations regarding independently fixable logic flaws, the missing token expiration validation (`exp`) has been moved into this separate tracking entry so a distinct CVE ID can be correctly mapped to it.\n\n### Questions\n\nIf there are any questions or comments about this advisory, send an email to [security@zitadel.com](mailto:security@zitadel.com)\n\n### Credits\n\nZITADEL thanks [Android-Login-Analysis](https://github.com/Android-Login-Analysis), Jason Zhou and [Pedro Giglioti](https://github.com/Punisher100) for reporting this vulnerability.",
  "id": "GHSA-v77h-2w3m-94hx",
  "modified": "2026-09-11T21:32:14Z",
  "published": "2026-09-11T21:32:14Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/security/advisories/GHSA-v77h-2w3m-94hx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56665"
    },
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/commit/4925fab849d39a88674485d937b79e54318b48a8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/commit/d1c3aa84af8fcb0f33910ada30b866f4afb551ac"
    },
    {
      "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 Expiration (`exp`) Validation in JWT IdP Provider"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Action not permitted

CVE-2026-56665 (GCVE-0-2026-56665)

FKIE_CVE-2026-56665

GHSA-V77H-2W3M-94HX

Summary

Impact

Affected Versions

Patches

Workarounds

Publication Note

Questions

Credits

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