CVE-2026-55376 Heym - Command Injection

Heym < 0.0.40 contains a sandbox bypass caused by allowed standard-library modules exposing OS, process, and filesystem capabilities in python_tool_executor.py, letting authenticated users execute arbitrary code, exploit requires workflow creation or editing with Agent custom Python tool.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.36% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Command Injection
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
13 October 2026
Updated
15 October 2026
Weakness
CWE-78

Vendor fix

Update to version 0.0.40 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs