CVE-2026-45227

Summary

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.

Affected Software

VendorProductVersion RangeStatus
heymrunheym0 < 0.0.21affected
heymrunheym32b7e809d987d9b018ec8daa2cdaf48f627f26f1unaffected

Weaknesses

  • CWE-693: Protection Mechanism Failure

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: poc
    • Automatable: no
    • Technical Impact: total

Additional References

References