Heym < 0.0.21 Authorization Bypass in Workflow Execution_CVE-2026-45226

7.6 / 10

HIGH

CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

Description

Heym before 0.0.21 contains an authorization bypass vulnerability in workflow execution that allows authenticated users to execute arbitrary workflows by referencing victim workflow UUIDs without proper access validation. Attackers can create workflows with execute nodes or agent subWorkflowIds pointing to victim workflow UUIDs to load and execute those workflows under attacker-controlled execution paths, exposing victim workflow outputs and triggering workflow nodes with unintended side effects.

Basic Information

ID CVE-2026-45226

Source VulnCheck

Published May 12, 2026 at 21:17

Affected Product

Vendor heymrun

Product heym

Affected Versions heymrun heym 0

CWE Classification

CWE-863

References

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    "published": "2026-05-12T21:17:10.526Z",
    "modified": "2026-05-12T21:17:10.526Z",
    "type": "cve",
    "title": "Heym < 0.0.21 Authorization Bypass in Workflow Execution",
    "source": "VulnCheck",
    "references": "https://github.com/heymrun/heym/releases/tag/v0.0.21\nhttps://github.com/heymrun/heym/pull/93\nhttps://github.com/heymrun/heym/commit/3ae3ef6a7d3609da0e910f9ed6b81e99a1661ac8\nhttps://www.vulncheck.com/advisories/heym-authorization-bypass-in-workflow-execution",
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