CVE-2026-67545

HIGH 7.4

Heym: Server-Side Request Forgery (SSRF) in HTTP Workflow Node

CVSS Score

7.4

EPSS Score

0.0%

EPSS Percentile

0th

Heym builds and runs agentic systems and business-process automations on self-hosted infrastructure. Prior to version 0.0.73, the HTTP workflow node in Heym makes outbound HTTP requests to user-supplied URLs without validation of the target host or IP address. If a workflow author has already configured an HTTP node that targets internal addresses such as cloud metadata endpoints or private network hosts, and exposed the workflow with anonymous execution, an unauthenticated attacker can trigger the preconfigured SSRF sink. The same project has comprehensive SSRF protection in its MCP integration, which is absent from the HTTP node. This issue has been patched in version 0.0.73.

CWE	CWE-918
Vendor	heymrun
Product	heym
Published	Nov 11, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

heymrun / heym

< 0.0.73

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/heymrun/heym/security/advisories/GHSA-8wj7-v2w6-wfcx github.com: https://github.com/heymrun/heym/commit/360a8de56ab9be0b11acdfe89168c5f2d7ab6b1e github.com: https://github.com/heymrun/heym/commit/583311603f8f81bf2f45a842727046ef17c99c9e github.com: https://github.com/heymrun/heym/commit/87c216f6e564c58d1dd747115d079fb487233ccf github.com: https://github.com/heymrun/heym/releases/tag/0.0.73