# CVE-2026-67545: Heym: Server-Side Request Forgery (SSRF) in HTTP Workflow Node

Status: published. Published: 2026-11-11. Updated: 2026-11-11.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- heymrun / heym: < 0.0.73 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 3.1: 7.4 (high); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-918

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/heymrun/heym/security/advisories/GHSA-8wj7-v2w6-wfcx (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/heymrun/heym/commit/360a8de56ab9be0b11acdfe89168c5f2d7ab6b1e (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/heymrun/heym/commit/583311603f8f81bf2f45a842727046ef17c99c9e (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/heymrun/heym/commit/87c216f6e564c58d1dd747115d079fb487233ccf (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/heymrun/heym/releases/tag/0.0.73 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-67545; retrieved 2026-11-11; source updated 2026-11-11

Revision: 60fc028e2361d4395646c585c70612ed27e196ce55ceac6b5aa9b57f871881e8

Canonical: https://y2.dev/cve/CVE-2026-67545

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.