CVE-2026-40504
Creolabs Gravity < 0.9.6 Heap Buffer Overflow via gravity_vm_exec
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.
INFO
Published Date :
April 16, 2026, 2:16 a.m.
Last Modified :
July 14, 2026, 9:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | CRITICAL | MITRE-CVE | ||||
| CVSS 4.0 | CRITICAL | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Update Creolabs Gravity to version 0.9.6 or later.
- Review and sanitize untrusted scripts before evaluation.
- Apply vendor patches for affected software.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-40504.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-40504 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-40504
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-40504 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-40504 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jul. 14, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://github.com/marcobambini/gravity', 'vendor': 'marcobambini', 'product': 'gravity', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '0.9.6', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '18b9195598d9b944376754c6d1ad76e38a4adca1', 'versionType': 'git'}], 'defaultStatus': 'unaffected'}] [{'repo': 'https://github.com/marcobambini/gravity', 'vendor': 'marcobambini', 'product': 'gravity', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '0.9.6', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '18b9195598d9b944376754c6d1ad76e38a4adca1', 'versionType': 'git'}], 'packageURL': 'pkg:github/marcobambini/gravity', 'defaultStatus': 'unaffected'}] -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/marcobambini/gravity', 'vendor': 'marcobambini', 'product': 'gravity', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '0.9.6', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '18b9195598d9b944376754c6d1ad76e38a4adca1', 'versionType': 'git'}], 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-40504', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-04-16T13:45:28.279979Z'} -
New CVE Received by [email protected]
Apr. 16, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-122 Added Reference https://github.com/marcobambini/gravity/commit/18b9195598d9b944376754c6d1ad76e38a4adca1 Added Reference https://github.com/marcobambini/gravity/issues/437 Added Reference https://github.com/marcobambini/gravity/releases/tag/0.9.6 Added Reference https://www.vulncheck.com/advisories/creolabs-gravity-heap-buffer-overflow-via-gravity-vm-exec