Medium severity5.4NVD Advisory· Published Sep 1, 2026· Updated Sep 8, 2026
CVE-2026-84207
CVE-2026-84207
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.
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Affected products
2Patches
Vulnerability mechanics
References
6- github.com/heymrun/heym/blob/v0.0.97/backend/app/services/websocket_trigger_service.pynvd
- github.com/heymrun/heym/blob/v0.0.97/backend/app/services/websocket_utils.pynvd
- github.com/heymrun/heym/commit/540aade7c7495295062f32f4dfd0d6805f066f0cnvd
- github.com/heymrun/heym/releases/tag/v0.0.98nvd
- github.com/heymrun/heym/security/advisories/GHSA-mqw6-g845-w596nvd
- www.vulncheck.com/advisories/heym-before-0.0.98-ssrf-via-websocket-endpointsnvd
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