CVE-2026-40504
Creolabs Gravity < 0.9.6 Heap Buffer Overflow via gravity_vm_exec
- State
- Published
- Severity
- 9.3 Critical
- Published
- Apr 16, 2026
- Updated
- Jul 14, 2026
- Reserved
- Apr 13, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-122 Heap-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
gravitymarcobambini |
|
References
- https://github.com/marcobambini/gravity/releases/tag/0.9.6release-notes
- https://github.com/marcobambini/gravity/issues/437issue-tracking
- https://github.com/marcobambini/gravity/commit/18b9195598d9b944376754c6d1ad76e38a4adca1patch
- https://www.vulncheck.com/advisories/creolabs-gravity-heap-buffer-overflow-via-gravity-vm-execthird-party-advisory
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