{"answers":{"affected":"3 open source packages ship an affected version, including github.com/nuts-foundation/nuts-node.","exploited":"There is no known exploitation of CVE-2026-41164 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-41164 is a medium-severity authentication bypass vulnerability in nuts-foundation nuts-node, published on 26 May 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-41164 and fix it if it is affected.\n\nWhat it is: CVE-2026-41164 is a medium-severity authentication bypass vulnerability in nuts-foundation nuts-node, published on 26 May 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-41164 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/nuts-foundation/nuts-node (Go): affected all versions; no fix listed\n- github.com/nuts-foundation/nuts-node (Go): affected all versions up to 1.1.0; no fix listed\n- github.com/nuts-foundation/nuts-node (Go): affected all versions up to 1.1.0; no fix listed\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-41164/ (Markdown: https://insights.sbomify.com/CVE-2026-41164/index.md)","id":"CVE-2026-41164","markdown":"https://insights.sbomify.com/CVE-2026-41164/index.md","name":"CVE-2026-41164","record":{"aliases":["GHSA-9hmg-827w-9rhj","GO-2026-5291"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Nuts node implementation","requires_auth":"low_privilege","summary":"Attackers can replay Verifiable Presentation JWTs as valid access tokens due to missing type validation, bypassing authentication controls.","user_interaction":"required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":4.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-345","name":"Insufficient Verification of Data Authenticity"}],"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.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"nuts-node: JWT type confusion in v1 access token introspection allows VP replay as access token","id":"CVE-2026-41164","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"OpenRemote has Improper Access Control via updateUserRealmRoles function","id":"CVE-2026-41166"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/nuts-foundation/nuts-node","purl":"pkg:golang/github.com/nuts-foundation/nuts-node","source":"GO-2026-5291"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.1.0"],"package":"github.com/nuts-foundation/nuts-node","purl":null,"source":"GHSA-9hmg-827w-9rhj"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.1.0"],"package":"github.com/nuts-foundation/nuts-node","purl":"pkg:golang/github.com/nuts-foundation/nuts-node","source":"GHSA-9hmg-827w-9rhj"}],"prev":{"headline":"bubblewrap vulnerable to privilege escalation in setuid mode via ptrace","id":"CVE-2026-41163"},"products":["nuts-node"],"published":"2026-05-26","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-27","vendors":["nuts-foundation"]},"summary":"Attackers can replay Verifiable Presentation JWTs as valid access tokens due to missing type validation, bypassing authentication controls.","url":"https://insights.sbomify.com/CVE-2026-41164/"}