CVE-2023-37365
Python vulnerability analysis and mitigation

Overview

Hnswlib version 0.7.0 contains a double free vulnerability in the init_index function when the M argument is set to a large integer. The vulnerability was disclosed on June 30, 2023, and affects the Python package hnswlib available through the PyPI package manager (NVD, MITRE).

Technical details

The vulnerability is classified as CWE-415 (Double Free) and has been assigned a CVSS v3.1 base score of 6.5 (Medium) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. The issue specifically occurs in the init_index function when initializing the index with an extremely large value for the M parameter (NVD).

Impact

The vulnerability can lead to a crash of the application due to memory corruption caused by the double free condition. This primarily affects the availability of the system, as indicated by the CVSS scoring which shows high impact on availability but no impact on confidentiality or integrity (NVD).

Mitigation and workarounds

Users are advised to avoid using versions less than or equal to 0.7.0 of the hnswlib package (FortiGuard).

Additional resources


SourceThis report was generated using AI

Related Python vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2025-67511CRITICAL9.6
  • PythonPython
  • cai-framework
NoNoDec 09, 2025
CVE-2025-66645HIGH7.5
  • PythonPython
  • nicegui
NoYesDec 09, 2025
GHSA-9rwj-6rc7-p77cHIGH7.3
  • PythonPython
  • langgraph-checkpoint-sqlite
NoYesDec 10, 2025
CVE-2025-67502MEDIUM5.4
  • PythonPython
  • taguette
NoYesDec 10, 2025
CVE-2025-67485MEDIUM5.3
  • PythonPython
  • mad-proxy
NoNoDec 09, 2025

Free Vulnerability Assessment

Benchmark your Cloud Security Posture

Evaluate your cloud security practices across 9 security domains to benchmark your risk level and identify gaps in your defenses.

Request assessment

Get a personalized demo

Ready to see Wiz in action?

"Best User Experience I have ever seen, provides full visibility to cloud workloads."
David EstlickCISO
"Wiz provides a single pane of glass to see what is going on in our cloud environments."
Adam FletcherChief Security Officer
"We know that if Wiz identifies something as critical, it actually is."
Greg PoniatowskiHead of Threat and Vulnerability Management