CVE-2026-67540
Heym - Horizontal IDOR: get-by-id on workflow/node templates skips the visibility check the list path enforces
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.
INFO
Published Date :
Nov. 11, 2026, 9:38 p.m.
Last Modified :
Nov. 11, 2026, 9:38 p.m.
Remotely Exploit :
Yes !
Source :
GitHub_M
Affected Products
The following products are affected by CVE-2026-67540
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update Heym to version 0.0.70 or later.
- Ensure templates have correct visibility settings.
- Review shared template access controls.
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CVE-2026-67540 vulnerability anywhere in the article.