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 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.

CVSS

No CVSS.

References

Link	Resource
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

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-03 16:17

Updated : 2026-09-09 21:09

NVD link : CVE-2026-53720

Mitre link : CVE-2026-53720

CVE.ORG link : CVE-2026-53720

JSON object : View

Products Affected

No product.

CWE

CWE-122

Heap-based Buffer Overflow

CWE-787

Out-of-bounds Write

CWE-1284

Improper Validation of Specified Quantity in Input

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