CVE-2026-67540
Heym - Horizontal IDOR: get-by-id on workflow/node templates skips the visibility check the list path enforces
- Medium 6.5
Description
Heym builds and runs agentic systems and business-process automations on self-hosted infrastructure. Prior to version 0.0.70, get_workflow_template / get_node_template fetches a template by ID with no visibility / author / shared_with predicate, so any authenticated user can read (and use) any other tenant's private (visibility=specific_users) template — including its full node/edge graph and the email addresses it was shared with. The list endpoint enforces visibility correctly; the single-item get/use paths do not. This issue has been patched in version 0.0.70.
Key facts
- Published
- 11 Nov 2026
- Last changed
- 13 Nov 2026
- Assigned by
- GitHub_M
- EPSS
- 0.384% likely to be exploited in the next 30 days, higher than 33.045% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: poc; Automatable: no; Technical impact: partial
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 6.5CVSS 3.1, Mediumfrom the CNA (GitHub_M)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
No explicit remediation statement is available on this page yet. Consult the original record and vendor references before choosing a fix.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| heymrun | heym |
|
Timeline
- 11 Nov 2026 Published