MEDIUM 5.1 NVD
CVE-2026-53720
pymonocypher uses cython to wrap the Monocypher C library. Prior to version 4.0.2.8, the argon2i_32 implementation does not check the nb_blocks size. If the cal
pymonocypher uses cython to wrap the Monocypher C library. Prior to version 4.0.2.8, the argon2i_32 implementation does not check the nb_blocks size. If the caller does not provide a sufficiently large buffer based on the API contract, then argon2i_32 will write past the end of the buffer and possibly corrupt the heap. This issue has been patched in version 4.0.2.8.
References
- https://github.com/jetperch/pymonocypher/commit/90ff5b13b13b5673c372e188f482d8c172e6ab86
- https://github.com/jetperch/pymonocypher/releases/tag/v4.0.2.8
- https://github.com/jetperch/pymonocypher/security/advisories/GHSA-8f95-v3jq-cj86
This medium severity vulnerability with a CVSS score of 5.1 was published on 2026-09-03 via NVD.
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