{"id":"CVE-2026-41213","revision":"09dbeadc1f1c4eaaa36f3fd3874bbc7e","records":[{"revision":"09dbeadc1f1c4eaaa36f3fd3874bbc7e","observedAt":"2026-10-27T10:10:07.342+00:00","statement":{"source":"nvd","id":"CVE-2026-41213","aliases":[],"title":"@node-oauth/oauth2-server is a module for implementing an OAuth2 server in Node.js. The token exchange path accepts RFC7636-invalid code_verifier values (including one-character strings) for S256 PKCE flows. Because short/weak verifiers are…","description":"@node-oauth/oauth2-server is a module for implementing an OAuth2 server in Node.js. The token exchange path accepts RFC7636-invalid code_verifier values (including one-character strings) for S256 PKCE flows. Because short/weak verifiers are accepted and failed verifier attempts do not consume the authorization code, an attacker who intercepts an authorization code can brute-force code_verifier guesses online until token issuance succeeds.","state":0,"publishedAt":"2026-04-23T19:17:29.4+00:00","modifiedAt":"2026-10-26T21:10:00.17+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","score":5.9,"severity":"MEDIUM"}],"references":["https://github.com/node-oauth/node-oauth2-server/security/advisories/GHSA-jhm7-29pj-4xvf"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-41213","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-307","CWE-1289"],"productCriteria":["cpe:2.3:a:node-oauth:node-oauth\\/oauth2-server:*:*:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-04-23T19:17:29.400","lastModified":"2026-10-26T21:10:00.170"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-41213","identifiers":["CVE-2026-41213"]},"retained":false,"historicalAffected":[]}],"coverage":[]}