{"id":"CVE-2026-102600","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-102600","generatedAt":"2026-10-28T03:41:44.049Z","title":"Prior to 0.1.1, @socket.io/cluster-engine uses inherited object properties when looking up attacker-controlled session IDs in clustered deployments.","description":"Socket.IO enables bidirectional and low-latency communication for every platform. Prior to 0.1.1, @socket.io/cluster-engine uses inherited object properties when looking up attacker-controlled session IDs in clustered deployments. Special property names such as __proto__ or constructor can resolve through the object prototype chain instead of identifying an actual connected client, causing the Node.js process to crash and resulting in denial of service. Applications that do not use @socket.io/cluster-engine are not affected. This issue is fixed in version 0.1.1.","published":"2026-09-29T16:17:06.000Z","lastModified":"2026-09-30T19:38:27.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-20","CWE-1321"],"affected":[],"epss":{"score":0.00382,"percentile":0.32031,"date":"2026-10-27","history":[{"date":"2026-09-30","score":0.00366,"percentile":0.28039}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.38%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-29T16:17:06.000Z","detail":{"score":"7.5","severity":"HIGH","publishedAt":"2026-09-29T16:17:06.180Z"},"summary":"New CVE, high severity (CVSS 7.5)."}],"references":[{"url":"https://github.com/socketio/socket.io/commit/830e3642ebb8dc3784eb749b0a004fe2b932b429","source":"security-advisories@github.com"},{"url":"https://github.com/socketio/socket.io/releases/tag/@socket.io/cluster-engine@0.1.1","source":"security-advisories@github.com"},{"url":"https://github.com/socketio/socket.io/security/advisories/GHSA-wfpm-5gcm-94cg","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-102600","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}