Improper Validation of Specified Quantity in Input Affecting pymonocypher package, versions [,4.0.2.7)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-PYMONOCYPHER-17911752
- published9 Jul 2026
- disclosed9 Jul 2026
- creditUnknown
Introduced: 9 Jul 2026
CVE-2026-53720 (opens in a new tab)How to fix?
Upgrade pymonocypher to version 4.0.2.7 or higher.
Overview
pymonocypher is a Python ctypes bindings to the Monocypher library
Affected versions of this package are vulnerable to Improper Validation of Specified Quantity in Input in the argon2i_32 function when the provided buffer for nb_blocks is too small. An attacker can cause memory corruption or potentially execute arbitrary code by supplying an undersized buffer to the function.
Workaround
This vulnerability can be mitigated by providing a correctly sized nb_blocks buffer.