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CVE-2026-100865— Heym before 0.0.53 Remote Code Execution via eval() Sandbox Escape

Quick assessment

Affected

heymrun heym

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Heym 0.0.53 之前的版本中，工作流条件表达式在工作流执行器服务中使用 Python 的 eval() 函数进行评估，且沙箱机制不够严格。经过身份验证的用户可以编辑工作流条件节点或导入恶意模板，从而以后端进程用户的身份执行任意 Python 代码和操作系统命令。

CVSS 8.8 · High EPSS 0.45% · P36 Updated Sep 28, 2026

Possible ATT&CK Techniques 2 AI

T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

Heym before 0.0.53 Remote Code Execution via eval() Sandbox Escape

Source: CVE Program / CVE List V5

Vulnerability Description

Heym before 0.0.53 evaluates workflow condition expressions using Python's eval() with insufficient sandboxing in the workflow executor service. Authenticated users can edit workflow condition nodes or import malicious templates to execute arbitrary Python and OS commands as the backend process 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

对生成代码的控制不恰当(代码注入)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
heymrun	heym	0 ~ 0.0.53	-

II. Public POCs for CVE-2026-100865

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-100865

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Other References for CVE-2026-100865 (2)

https://www.cve.org/CVERecord?id=CVE-2026-100865

Same Patch Batch · heymrun · 2026-09-27 · 10 CVEs total

CVE-2026-100864	8.8 HIGH	heym before 0.0.91 Remote Code Execution via Expression Engine
CVE-2026-100858	6.8 MEDIUM	heym before 0.0.109 Server-Side Request Forgery via Workflow Nodes
CVE-2026-101050	6.5 MEDIUM	Heym before 0.0.53 Authentication Bypass via Telegram Webhook
CVE-2026-101049	6.5 MEDIUM	Heym before 0.0.53 Slack Webhook Signature Verification Bypass
CVE-2026-100859	6.5 MEDIUM	Heym before 0.0.106 Credential Exfiltration via URL Override
CVE-2026-100860	5.5 MEDIUM	heym before 0.0.105 Authentication Bypass via Redis Node
CVE-2026-100861	5.0 MEDIUM	heym before 0.0.105 SSRF via credential-controlled base URLs
CVE-2026-100863	5.0 MEDIUM	Heym before 0.0.91 SSRF via image fetching and IPv6 validation
CVE-2026-100862	4.9 MEDIUM	heym before 0.0.91 Multiple Secrets Plaintext Storage

IV. Related Vulnerabilities

Same product: heym

Same vendor: heymrun

Same weakness: CWE-94

V. Comments for CVE-2026-100865

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2026-100865— Heym before 0.0.53 Remote Code Execution via eval() Sandbox Escape

Quick assessment

Possible ATT&CK Techniques 2 AI

I. Basic Information for CVE-2026-100865

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2026-100865

III. Intelligence Information for CVE-2026-100865

Other References for CVE-2026-100865 (2)

Same Patch Batch · heymrun · 2026-09-27 · 10 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2026-100865

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