Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/heymrun/heym/security/advisories/GHSA-87x2-9jwx-7gh4
- https://www.vulncheck.com/advisories/heym-before-0.0.91-remote-code-execution-vi
- https://github.com/heymrun/heym/security/advisories/GHSA-87x2-9jwx-7gh4
FAQ
What is CVE-2026-100864?
CVE-2026-100864 is a vulnerability with a CVSS score of 8.8 (HIGH). 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. Attacke...
How severe is CVE-2026-100864?
CVE-2026-100864 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-100864?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.