CVE-2026-59725

{"id": "CVE-2026-59725", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-59725", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-08T16:50:45.800976Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "socketio", "product": "socket.io", "versions": [{"status": "affected", "version": ">= 4.1.0, < 6.6.7"}]}]}], "published": "2026-07-08T16:16:33.133", "references": [{"url": "https://github.com/socketio/socket.io/commit/fc11285e14964c2132d122164bf130c355f60671", "source": "security-advisories@github.com"}, {"url": "https://github.com/socketio/socket.io/releases/tag/engine.io@6.6.7", "source": "security-advisories@github.com"}, {"url": "https://github.com/socketio/socket.io/security/advisories/GHSA-r635-g3xr-vw7x", "source": "security-advisories@github.com"}], "vulnStatus": "Received", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-404"}]}], "descriptions": [{"lang": "en", "value": "Socket.IO enables bidirectional and low-latency communication for every platform. From 4.1.0 before 6.6.7, Engine.IO protocol v4 polling transport does not properly close the HTTP response for invalid binary POST requests with Content-Type: application/octet-stream, allowing an unauthenticated attacker to exhaust server-side connections and sockets. This issue is fixed in version 6.6.7."}], "lastModified": "2026-07-08T18:16:34.457", "sourceIdentifier": "security-advisories@github.com"}