MEDIUM6.5

PYSEC-2026-1450

hnswlib Double Free vulnerability

Quick fix

PYSEC-2026-1450 — hnswlib: upgrade to the fixed version with the command below.

pip install --upgrade 'hnswlib>=0.8.0'

Details

Hnswlib 0.7.0 has a double free in `init_index` when the M argument is a large integer.

Are you affected?

Enter the version of the package you're using.

Affected packages

Introduced in: 0Fixed in: 0.8.0

Fixpip install --upgrade 'hnswlib>=0.8.0'

References

https://nvd.nist.gov/vuln/detail/CVE-2023-37365[ADVISORY]
https://github.com/nmslib/hnswlib/issues/467[WEB]
https://github.com/nmslib/hnswlib/pull/484[WEB]
https://github.com/nmslib/hnswlib/commit/f6d170ce0b41f9e75ace473b09df6e7872590757[WEB]
https://github.com/nmslib/hnswlib[PACKAGE]
https://pypi.org/project/hnswlib[PACKAGE]
https://github.com/advisories/GHSA-xwc8-rf6m-xr86[ADVISORY]