{"schema":"threatline.record/2","record":{"id":"CVE-2026-94486","aliases":["GHSA-39w2-rjm5-chcv"],"summary":"Next.js has information disclosure in development server's Model Context Protocol endpoint","details":"The Next.js development server (`next dev`) exposes a Model Context Protocol endpoint that does not verify which website a request originates from, allowing a malicious website visited by the developer to read sensitive development data — including the project's location on disk, source code snippets from error reports, the route inventory, and development logs. Only applications run with `next dev` are affected. Production deployments do not serve this endpoint.","categories":["Frameworks"],"product":"next","vendor":"vercel","ecosystem":"npm","affected_ranges":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-39w2-rjm5-chcv","source_modified_at":"2026-10-07T20:31:52Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"next"},"range":">= 16.0.0, < 16.3.8"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-94486","source_modified_at":"2026-10-02T16:20:19.256Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"next.js","vendor":"vercel","versions":[{"version":">= 16.0.0, < 16.3.8","status":"affected"}],"defaultStatus":null},{"source":"GitHub Advisory Database","source_url":"https://github.com/vercel/next.js/security/advisories/GHSA-39w2-rjm5-chcv","source_modified_at":"2026-09-30T16:14:15Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"next"},"range":">= 16.0.0"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-39w2-rjm5-chcv","source_modified_at":"2026-10-07T20:45:05.342044468Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"next","purl":"pkg:npm/next"},"ranges":[{"events":[{"introduced":"16.0.0"},{"fixed":"16.3.8"}],"type":"SEMVER"}],"versions":[]}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-39w2-rjm5-chcv","source_modified_at":"2026-10-07T20:31:52Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"next"},"version":"16.3.8"},{"source":"GitHub Advisory Database","source_url":"https://github.com/vercel/next.js/security/advisories/GHSA-39w2-rjm5-chcv","source_modified_at":"2026-09-30T16:14:15Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"next"},"version":"16.3.?"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-39w2-rjm5-chcv","source_modified_at":"2026-10-07T20:45:05.342044468Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"next","purl":"pkg:npm/next"},"version":"16.3.8"}],"cvss":2.3,"severity":"Low","kev":{"listed":false},"epss":{"probability":0.00114,"percentile":0.01384,"score_date":"2026-10-23"},"published_at":"2026-10-02T15:12:31.134Z","modified_at":"2026-10-07T20:45:05.342044468Z","provenance":[{"source":"GitHub Advisory Database","url":"https://github.com/advisories/GHSA-39w2-rjm5-chcv","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-07T20:31:52Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-94486","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-02T16:20:19.256Z"},{"source":"GitHub Advisory Database","url":"https://github.com/vercel/next.js/security/advisories/GHSA-39w2-rjm5-chcv","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-09-30T16:14:15Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-39w2-rjm5-chcv","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-07T20:45:05.342044468Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-94486","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["GitHub Advisory Database","CVE List","OSV","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/vercel/next.js/security/advisories/GHSA-39w2-rjm5-chcv","tags":["x_refsource_CONFIRM"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-94486","source":"GitHub Advisory Database"},{"source":"CVE List","url":"https://github.com/vercel/next.js/commit/2d9f50a409312696145b82b3157aadb6b1fef476","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/vercel/next.js/releases/tag/v16.3.8","tags":["x_refsource_MISC"]},{"url":"https://github.com/advisories/GHSA-39w2-rjm5-chcv","source":"GitHub Advisory Database"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-02T16:20:02.218983Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-07T20:45:05.342044468Z","content_hash":"6c4711942f3e633127af7b0cfa12b23e0159dfd6d36061c2ae9de440df3e1505"}}