{"cve":"CVE-2015-9235","nvd":{"published":"2018-05-29T20:29:00.330","modified":"2026-06-17T00:36:06.623","status":"Modified","description":"In jsonwebtoken node module before 4.2.2 it is possible for an attacker to bypass verification when a token digitally signed with an asymmetric key (RS/ES family) of algorithms but instead the attacker send a token digitally signed with a symmetric algorithm (HS* family).","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-327","CWE-20"],"references":["https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/","https://github.com/auth0/node-jsonwebtoken/commit/1bb584bc382295eeb7ee8c4452a673a77a68b687","https://nodesecurity.io/advisories/17","https://www.timmclean.net/2015/02/25/jwt-alg-none.html","https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/"],"products":["auth0:jsonwebtoken"],"source":"nvd","synced_at":"2026-10-19T20:50:40.212176939+00:00"},"epss":{"cve":"CVE-2015-9235","score":0.08524,"percentile":0.95047,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-c7hr-j4mj-j2w6","url":"https://osv.dev/vulnerability/GHSA-c7hr-j4mj-j2w6","summary":"Verification Bypass in jsonwebtoken","modified":"2026-09-10T03:48:15.346337398Z","packages":[{"ecosystem":"npm","name":"jsonwebtoken","purl":"pkg:npm/jsonwebtoken","ranges":["<4.2.2"],"fixed":["4.2.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}