CVE-2026-45227

HIGH EPSS 13.4%
Published May 12, 20261mo ago · Modified Jun 17, 20262w ago
8.7 CVSS 4.0
High
Find Similar
Published May 12, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
8.7
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
13.4% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-693

References 4

  • github.com https://github.com/heymrun/heym/commit/32b7e809d987d9b018ec8daa2cdaf48f627f26f1
  • github.com https://github.com/heymrun/heym/pull/94
  • github.com https://github.com/heymrun/heym/releases/tag/v0.0.21
  • vulncheck.com https://www.vulncheck.com/advisories/heym-sandbox-escape-via-python-introspection

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.