Vulnerability Description
Creolabs Gravity before 0.9.6 contains a heap buffer overflow vulnerability in the gravity_vm_exec function that allows attackers to write out-of-bounds memory by crafting scripts with many string literals at global scope. Attackers can exploit insufficient bounds checking in gravity_fiber_reassign() to corrupt heap metadata and achieve arbitrary code execution in applications that evaluate untrusted scripts.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/marcobambini/gravity/commit/18b9195598d9b944376754c6d1ad76e38
- https://github.com/marcobambini/gravity/issues/437
- https://github.com/marcobambini/gravity/releases/tag/0.9.6
- https://www.vulncheck.com/advisories/creolabs-gravity-heap-buffer-overflow-via-g
FAQ
What is CVE-2026-40504?
CVE-2026-40504 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Creolabs Gravity before 0.9.6 contains a heap buffer overflow vulnerability in the gravity_vm_exec function that allows attackers to write out-of-bounds memory by crafting scripts with many string lit...
How severe is CVE-2026-40504?
CVE-2026-40504 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-40504?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.