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      <title>CVE-2026-41164 — nuts-node: JWT type confusion in v1 access token introspection allows VP replay as access token</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-41164</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; nuts-foundation nuts-node&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; nuts-foundation nuts-node&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</content:encoded>
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