{"cve":"CVE-2026-40155","nvd":{"published":"2026-04-17T21:16:33.713","modified":"2026-06-17T10:44:47.060","status":"Analyzed","description":"The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. In versions 4.12.0 through 4.17.1, simultaneous requests that trigger a nonce retry may cause the proxy cache fetcher to perform improper lookups for the token request results. Users are affected if their project uses both the vulnerable versions and the proxy handler /me/* and /my-org/* with DPoP enabled. This issue has been fixed in version 4.18.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N","score":5.4},"cwes":["CWE-362","CWE-863"],"references":["https://github.com/auth0/nextjs-auth0/commit/98c36dc306970c2230ea1a32efef431d29b99978","https://github.com/auth0/nextjs-auth0/releases/tag/v4.18.0","https://github.com/auth0/nextjs-auth0/security/advisories/GHSA-xq8m-7c5p-c2r6"],"products":["auth0:nextjs-auth0"],"source":"nvd","synced_at":"2026-10-19T22:30:49.762551342+00:00"},"epss":{"cve":"CVE-2026-40155","score":0.00214,"percentile":0.1182,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-xq8m-7c5p-c2r6","url":"https://osv.dev/vulnerability/GHSA-xq8m-7c5p-c2r6","summary":"Auth0 Next.js SDK has Improper Proxy Cache Lookup","modified":"2026-04-21T15:56:31.005142Z","packages":[{"ecosystem":"npm","name":"@auth0/nextjs-auth0","purl":"pkg:npm/%40auth0/nextjs-auth0","ranges":[">=4.12.0 <4.18.0"],"fixed":["4.18.0"]}]}],"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."]}