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CVE

CWE

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CVE-2026-40504

Published: Apr 16, 2026

Modified: Apr 16, 2026

PUBLISHED

CVSS v3.1

9.8

CRITICAL

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.

Vendor	Product	Versions
marcobambini	gravity	affected `0 - < 0.9.6` affected `0 - < 18b9195598d9b944376754c6d1ad76e38a4adca1`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

References

https://github.com/marcobambini/gravity/releases/tag/0.9.6

release-notes

https://github.com/marcobambini/gravity/issues/437

issue-tracking

https://github.com/marcobambini/gravity/commit/18b9195598d9b944376754c6d1ad76e38a4adca1

patch

https://www.vulncheck.com/advisories/creolabs-gravity-heap-buffer-overflow-via-gravity-vm-exec

third-party-advisory

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