CVE-2026-84207

EUVD-2026-69295
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.
SSRF
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.4 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Common Weakness Enumeration
References
https://github.com/heymrun/heym
https://github.com/heymrun/heym/blob/v0.0.97/backend/app/services/websocket_trigger_service.py
https://github.com/heymrun/heym/blob/v0.0.97/backend/app/services/websocket_utils.py
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-endpoints