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/introspectaccesstoken) 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.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41164.json",
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-345"
]
}{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"introduced": "6.0.0-alpha.1"
},
{
"fixed": "6.2.3"
},
{
"introduced": "0"
},
{
"fixed": "5.4.31"
}
]
}