Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/heymrun/heym
- https://github.com/heymrun/heym/blob/v0.0.97/backend/app/services/websocket_trig
- https://github.com/heymrun/heym/blob/v0.0.97/backend/app/services/websocket_util
- https://github.com/heymrun/heym/commit/540aade7c7495295062f32f4dfd0d6805f066f0c
- https://github.com/heymrun/heym/releases/tag/v0.0.98
- https://github.com/heymrun/heym/security/advisories/GHSA-mqw6-g845-w596
- https://www.vulncheck.com/advisories/heym-before-0.0.98-ssrf-via-websocket-endpo
FAQ
What is CVE-2026-84207?
CVE-2026-84207 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 wit...
How severe is CVE-2026-84207?
CVE-2026-84207 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-84207?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.