{"id":"CVE-2026-84207","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-84207","generatedAt":"2026-10-28T07:04:42.761Z","title":"Heym before 0.0.98 fails to apply SSRF egress guards to WebSocket Send and WebSocket Trigger nodes, allowing authenticated users to connect to internal services.","description":"Heym before 0.0.98 fails to apply SSRF egress guards to WebSocket Send and WebSocket Trigger nodes, allowing authenticated users to connect to internal services. Attackers can craft workflow nodes with arbitrary URLs and headers to reach internal services and read responses from the WebSocket Trigger node.","published":"2026-09-01T16:17:36.000Z","lastModified":"2026-09-08T20:18:59.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":5.3,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-918"],"affected":[],"epss":{"score":0.00348,"percentile":0.28258,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.35%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/heymrun/heym","source":"disclosure@vulncheck.com"},{"url":"https://github.com/heymrun/heym/blob/v0.0.97/backend/app/services/websocket_trigger_service.py","source":"disclosure@vulncheck.com"},{"url":"https://github.com/heymrun/heym/blob/v0.0.97/backend/app/services/websocket_utils.py","source":"disclosure@vulncheck.com"},{"url":"https://github.com/heymrun/heym/commit/540aade7c7495295062f32f4dfd0d6805f066f0c","source":"disclosure@vulncheck.com"},{"url":"https://github.com/heymrun/heym/releases/tag/v0.0.98","source":"disclosure@vulncheck.com"},{"url":"https://github.com/heymrun/heym/security/advisories/GHSA-mqw6-g845-w596","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/heym-before-0.0.98-ssrf-via-websocket-endpoints","source":"disclosure@vulncheck.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-84207","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."}