CVE-2026-100858
heym before 0.0.109 Server-Side Request Forgery via Workflow Nodes
- State
- Published
- Severity
- 7.6 High
- Published
- Sep 27, 2026
- Updated
- Sep 30, 2026
- Reserved
- Sep 27, 2026
Description
heym before 0.0.109 contains a server-side request forgery vulnerability in the Slack, Discord, and Crawler workflow nodes. These nodes issue HTTP requests to URLs taken from user-created credentials (webhook_url / flaresolverr_url) using an unguarded HTTP client, bypassing the SSRF egress guard that already protects the HTTP, WebSocket, and MCP nodes; the credential API validates only that the URL is non-empty. Any registered user can create a credential pointing at an internal address and execute a workflow, causing the backend to reach loopback, private, link-local, or cloud-metadata endpoints and return the full response body in the node output (non-blind SSRF).
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.6 High | CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.8 Medium | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-918 Server-Side Request Forgery (SSRF)
Affected Products
| Product | Versions |
|---|---|
heymheymrun |
|
References
- GitHub Security Advisory (GHSA-39j3-6x3x-8rcr)vendor-advisory
- VulnCheck Advisory: heym before 0.0.109 Server-Side Request Forgery via Workflow Nodesthird-party-advisory
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