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.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 5.1
- CVSS vector
- CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
- EPSS probability
- 0.13%
- CWE
- CWE-122, CWE-787, CWE-1284
- Published
- 2026-09-03
- Last modified
- 2026-09-03
Affected products
- jetperch pymonocypher
Weakness type
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