OCTOBER 9, 2026
Live Feed
Back to database
Case File

CVE-2026-100864

HIGH · CVSS 8.8 EPSS 0.69% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-27 · Last synced 2026-10-09

CyberRota Analysis

AI-Generated

The vulnerability exists in the expression engine of heym versions prior to 0.0.91, allowing authenticated users to exploit a sandbox escape and execute arbitrary Python code. This can lead to unauthorized command execution on the backend, posing a significant risk to system integrity and data security. Organizations using affected versions should prioritize patching to mitigate potential exploitation.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-100864
Severity
HIGH
CVSS
8.8
EPSS
0.69%

Original NVD Description

heym before 0.0.91 contains a sandbox escape vulnerability in the expression engine's DotList map/filter and fallback resolver that allows authenticated users to execute arbitrary Python code. Attackers can craft workflow expressions using dunder attribute access through item expressions or the fallback resolver to access os.system and execute commands as the backend process.