ZITADEL up to 3.4.11/4.15.1 External JWT Identity Provider session.go iat improper authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in ZITADEL up to 3.4.11/4.15.1. Affected by this issue is some unknown functionality of the file internal/idp/providers/jwt/session.go of the component External JWT Identity Provider. Performing a manipulation of the argument iat results in improper authentication. This vulnerability is known as CVE-2026-56664. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in ZITADEL up to 3.4.11/4.15.1. It has been classified as problematic. This affects some unknown processing of the file internal/idp/providers/jwt/session.go of the component External JWT Identity Provider. The manipulation of the argument iat with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-56664 since 06/22/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

Upgrading to version 3.4.12 or 4.15.2 eliminates this vulnerability.

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Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: ZITADEL 3.4.12/4.15.2

Timelineinfo

06/22/2026 CVE reserved
07/10/2026 +18 days Advisory disclosed
07/10/2026 +0 days VulDB entry created
07/10/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-56664 (🔒)
GCVE (CVE): GCVE-0-2026-56664
GCVE (VulDB): GCVE-100-377565

Entryinfo

Created: 07/10/2026 20:11
Changes: 07/10/2026 20:11 (54)
Complete: 🔍
Cache ID: 216::103

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