{"id":"CVE-2026-41164","summary":"nuts-node: JWT type confusion in v1 access token introspection allows VP replay as access token","details":"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.","aliases":["GHSA-9hmg-827w-9rhj","GO-2026-5291"],"modified":"2026-07-31T18:29:54.234470506Z","published":"2026-05-26T17:35:59.019Z","related":["openSUSE-SU-2026:21483-1"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-345"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41164.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41164.json"},{"type":"ADVISORY","url":"https://github.com/nuts-foundation/nuts-node/security/advisories/GHSA-9hmg-827w-9rhj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41164"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/nuts-foundation/nuts-node","events":[{"introduced":"b5217ef60c4e98369139245156dd6d9ab997f812"},{"fixed":"0b48e510a1e72daeea07193c256e187358bca1ef"},{"introduced":"0"},{"fixed":"ba3095f896ff72cd8a546c3e0e745a32406da28a"}],"database_specific":{"extracted_events":[{"introduced":"6.0.0-alpha.1"},{"fixed":"6.2.3"},{"introduced":"0"},{"fixed":"5.4.31"}],"source":"AFFECTED_FIELD"}}],"versions":["v5.4.30","v6.2.2","v5.4.29","v6.2.1","v5.4.28","v5.4.27","v5.4.26","v6.2.0","v5.4.25","v5.4.24","v5.4.23","v5.4.22","v6.1.9","v5.4.21","v5.4.20","nuts-node-chart-0.0.7","nuts-node-chart-0.0.6","nuts-node-chart-0.0.5","v5.4.19","tmp_publish-binaries3","tmp_publish-binaries2","publish-binaries","v5.4.18","v5.4.17","v6.1.0","v5.4.16","v5.4.15","v6.1.0-rc.3","v6.1.0-rc.2","v6.1.0-beta.3","v5.4.14","v5.4.13","v6.1.0-beta.2","v5.4.12","v6.1.0-alpha.2","v6.1.0-rc.1","nuts-node-chart-0.0.4","v6.0.0","v5.4.11","v6.0.0-rc.10","v6.0.0-rc.9","v6.0.0-rc.8","v6.0.0-rc.7","v6.0.0-rc.6","v6.0.0-rc.5","v6.0.0-rc.4","v5.4.10","v6.0.0-rc.3","v6.0.0-rc.2","v6.0.0-beta.12","v6.0.0-rc.1","v6.0.0-beta.13","v5.4.9","v6.0.0-beta.11","v6.0.0-beta.10","v6.0.0-beta.9","v5.4.8","v5.4.7","v6.0.0-beta.8","v6.0.0-beta.4","v6.0.0-beta.3","v6.0.0-beta.2","v5.4.6","v6.0.0-beta.1","v6.0.0-alpha.7","v6.0.0-alpha.6","v6.0.0-alpha.5","v6.0.0-alpha.4","v6.0.0-alpha.3","v6.0.0-alpha.2","v6.0.0-alpha.1","v5.4.5","v5.4.4","v5.4.3","v5.4.2","v5.4.1","v5.4.0","v5.4.0-rc.2","v5.4.0-rc.1","nuts-node-chart-0.0.3","v5.3.0-rc.1","v5.3.0-alpha.2","v5.3.0-alpha.1","v5.2.0-rc.1","v5.1.0","v5.1.0-rc.3","v5.1.0-rc.2","v5.1.0-rc.1","nuts-node-chart-0.0.2","v5.0.0","v4.1.0","v4.0.0","v3.0.0","v2.0.0","v1.0.0","nuts-node-chart-0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41164.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N"}]}