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CVE-2023-37365

20
FAUCET Score

CVE-2023-37365 describes a double free vulnerability in Hnswlib version 0.7.0, specifically within the init_index function when a large integer is supplied for the 'M' argument. This medium-severity vulnerability (CVSS 6.5) can be triggered remotely with low attack complexity, potentially leading to a denial of service. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this flaw.

Impacted Technologies

VendorProductVersion(s)CPE
0.7.0CPE matchmatch criteria
cpe:2.3:a:hnswlib_project:hnswlib:0.7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.59%
Probability of exploitation in next 30 days
EPSS Percentile
44.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0059 is in the 48th percentile among its peer group of 26,234 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

pippatch availablevia ghsa
Product: hnswlibFixed in: 0.8.0

Vendor Advisories (1)

pipGHSA-xwc8-rf6m-xr86medium

hnswlib Double Free vulnerability

Jun 30, 2023

References

github.com / nmslib/hnswlib/issues/467
ExploitIssue TrackingThird Party Advisory