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CVE-2026-45227— Heym < 0.0.21 Sandbox Escape via Python Introspection

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，该漏洞源于自定义Python工具执行器中存在沙箱逃逸，可能导致经过身份验证的工作流作者通过对象图内省原语绕过沙箱限制。

CVSS 8.8 · High EPSS 0.23% · P14

Affected Version Matrix 2

VendorProduct Version RangeStatus
heymrun heym < 0.0.21 affected
32b7e809d987d9b018ec8daa2cdaf48f627f26f1 unaffected
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I. Basic Information for CVE-2026-45227

Vulnerability Information
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Vulnerability Title
Heym < 0.0.21 Sandbox Escape via Python Introspection
Source: CVE Program / CVE List V5
Vulnerability Description
Heym before 0.0.21 contains a sandbox escape vulnerability in the custom Python tool executor that allows authenticated workflow authors to bypass sandbox restrictions by using object-graph introspection primitives. Attackers can use Python introspection techniques to recover the unrestricted __import__ function, import blocked modules such as os and subprocess, and access inherited backend environment variables containing database credentials and encryption keys to execute arbitrary host commands as the backend service user.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
保护机制失效
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，该漏洞源于自定义Python工具执行器中存在沙箱逃逸，可能导致经过身份验证的工作流作者通过对象图内省原语绕过沙箱限制。
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-2026-45227

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 6691 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-45227

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Patches & Fixes for CVE-2026-45227 (3)

Vendor Advisories for CVE-2026-45227 (1)

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

CVE-2026-45225 7.6 HIGH Heym < 0.0.21 Path Traversal File Upload via upload_file()
CVE-2026-45226 7.1 HIGH Heym < 0.0.21 Authorization Bypass in Workflow Execution

IV. Related Vulnerabilities

Same product: heym
Same vendor: heymrun
Same weakness: CWE-693

V. Comments for CVE-2026-45227

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