CVE-2026-41164 Details
Description
nuts-node is the reference implementation of the Nuts specification. Prior to 6.2.3 and 5.4.31, the v1 access token introspection endpoint (/auth/v1/introspect_access_token) accepts any JWT signed by a key present on the node, without validating the JWT type, issuer-to-key binding, or required claims. This allows a Verifiable Presentation (VP) JWT to be replayed as an access token and receive an active: true introspection response. This vulnerability is fixed in 6.2.3 and 5.4.31.
A vulnerability exists in the Nuts Node implementation of the Nuts specification, specifically in versions prior to 6.2.3 and 5.4.31. The issue arises in the v1 access token introspection endpoint, which improperly accepts any JSON Web Token (JWT) signed by a key available on the node. This acceptance is made without validating crucial aspects such as the JWT type, the binding of the issuer to the signing key, or required claims. As a result, a Verifiable Presentation (VP) JWT can be replayed as an access token, receiving an 'active: true' response during introspection.
Users can update to Nuts Node versions 6.2.3 or 5.4.31, where this vulnerability has been fixed. If an update is not possible, resource servers can manually validate the introspection response by rejecting any tokens with empty 'service' or 'iss' fields, or where the 'sub' claim does not match the expected requester DID.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 26, 2026CISA-ADP
Assessed May 27, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/nuts-foundation/nuts-node/security/advisories/GHSA-9hmg-827w-9rhj | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-345 | Insufficient Verification of Data Authenticity | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| nuts-foundation nuts-node | <= v6.2.2 (semver) <= v5.4.30 (semver) |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 26, 2026 | New CVE Received | [email protected] |