GO-2026-6469Published

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

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cve-program · CVE-2026-56665

Published

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.

Source published: 10 Jul 2026 17:22:46 UTC
Source modified: 10 Jul 2026 18:17:48 UTC
Saved here: 23 Oct 2026 15:48:27 UTC
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CVSS 3.1 · 4.2 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

euvd · EUVD-2026-42963

Published

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datePublished: Jul 10, 2026, 5:22:46 PM

dateUpdated: Jul 10, 2026, 6:17:48 PM

Source published: Jul 10, 2026, 5:22:46 PM (timezone not stated)
Source modified: Jul 10, 2026, 6:17:48 PM (timezone not stated)
Saved here: 11 Nov 2026 14:06:43 UTC
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EUVD CVSS 3.1 · 4.2 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

nvd · CVE-2026-56665

Published

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Source analysis status: Deferred

Weakness classifications: CWE-613

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published: 2026-07-10T18:16:24.020

lastModified: 2026-07-10T19:17:26.663

Source published: 10 Jul 2026 18:16:24 UTC
Source modified: 10 Jul 2026 19:17:26 UTC
Saved here: 25 Oct 2026 14:19:10 UTC
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CVSS 3.1 · [email protected] · Secondary · 4.2 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

osv · GHSA-v77h-2w3m-94hx

Published

### 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](https://github.com/zitadel/zitadel/releases/tag/v4.15.2) * **3.x**: Upgrade to $\ge$ [3.4.12](https://github.com/zitadel/zitadel/releases/tag/v3.4.12) ### 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](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. ### Questions If there are any questions or comments about this advisory, send an email to [[email protected]](mailto:[email protected]) ### Credits ZITADEL thanks [Android-Login-Analysis](https://github.com/Android-Login-Analysis), Jason Zhou and [Pedro Giglioti](https://github.com/Punisher100) for reporting this vulnerability.

Source published: 11 Sep 2026 21:32:14 UTC
Source modified: 17 Sep 2026 17:40:56 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

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CVSS_V3 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Publisher rating · MODERATE

osv · GO-2026-6469

Published

ZITADEL: Missing Token Expiration (`exp`) Validation in JWT IdP Provider in github.com/zitadel/zitadel. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: github.com/zitadel/zitadel before v3.4.12, from v4.0.0-rc.1 before v4.15.2.

Source published: 16 Sep 2026 16:56:22 UTC
Source modified: 17 Sep 2026 17:30:12 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

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