VULNERABILITY INTELLIGENCE

CVE-2026-53720

EPSS probability0.18%
CISA KEVNot currently listed
Published2026-09-03
Last modified2026-09-09

Description

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.

Weakness classification

  • security-advisories@github.com: CWE-122

Primary references