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CVE-2026-45226— Heym < 0.0.21 Authorization Bypass in Workflow Execution

Quick assessment

Affected
heymrun heym
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Heym是heymrun开源的一个AI原生工作流自动化平台。 Heym 0.0.21之前版本存在安全漏洞，该漏洞源于工作流执行中存在授权绕过，可能导致经过身份验证的用户通过引用受害者工作流UUID执行任意工作流。

CVSS 7.1 · High EPSS 0.48% · P40

Affected Version Matrix 2

VendorProduct Version RangeStatus
heymrun heym < 0.0.21 affected
3ae3ef6a7d3609da0e910f9ed6b81e99a1661ac8 unaffected
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I. Basic Information for CVE-2026-45226

Vulnerability Information
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Vulnerability Title
Heym < 0.0.21 Authorization Bypass in Workflow Execution
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Heym 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Heym是heymrun开源的一个AI原生工作流自动化平台。 Heym 0.0.21之前版本存在安全漏洞，该漏洞源于工作流执行中存在授权绕过，可能导致经过身份验证的用户通过引用受害者工作流UUID执行任意工作流。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
heymrun heym 0 ~ 0.0.21 -

II. Public POCs for CVE-2026-45226

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8013 chars
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Trigger conditions & impact
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III. Intelligence Information for CVE-2026-45226

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Patches & Fixes for CVE-2026-45226 (3)

Vendor Advisories for CVE-2026-45226 (1)

Same Patch Batch · heymrun · 2026-05-12 · 3 CVEs total

CVE-2026-45227 8.8 HIGH Heym < 0.0.21 Sandbox Escape via Python Introspection
CVE-2026-45225 7.6 HIGH Heym < 0.0.21 Path Traversal File Upload via upload_file()

IV. Related Vulnerabilities

Same product: heym
Same vendor: heymrun
Same weakness: CWE-863

V. Comments for CVE-2026-45226

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