CVE-2026-40504CRITICAL 9.8EPSS p45.9%

CVE-2026-40504CVE-2026-40504

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.64% probability of exploitation · percentile 45.9% · 2026-06-19T12:03:05Z
Published2026-04-16
Last modified2026-05-01

Underlying weaknesses· 1

CWE-122

References

  1. https://github.com/marcobambini/gravity/commit/18b9195598d9b944376754c6d1ad76e38a4adca1
  2. https://github.com/marcobambini/gravity/issues/437
  3. https://github.com/marcobambini/gravity/releases/tag/0.9.6
  4. https://www.vulncheck.com/advisories/creolabs-gravity-heap-buffer-overflow-via-gravity-vm-exec

1

TypeTargetConfidenceTier
WeaknessHeap-based Buffer Overflowcwe-1220%live

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