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PyPI package

pymonocypher

Open actionable advisories and recorded vendor fixes. This public package view has no inventory attached and cannot establish whether your deployment is affected. A vendor fix never resolves your finding; verify your installed version and the source guidance.

Open advisories

1 actionable advisory, newest first. Withdrawn advisories and news are excluded. Coverage is partial.

  1. Medium, CVSS 5.1PyPIAmendedPublished

    pymonocypher: Potential heap buffer overflow on nb_blocks in argon2i_32 when provided buffer is too small

    CVE-2026-53720 · GHSA-8f95-v3jq-cj86

    Affected
    • PyPI pymonocypher < 4.0.2.8
    Fixed in
    4.0.2.8· Vendor fix available
    Issue
    Impact The argon2i32 implementation does not check the nbblocks size. If the caller does not provide a sufficiently large buffer based on the API contract, then argon2i32 will write past the end of the buffer and possibly corrupt the heap. Patches Fixed in 4.0.2.8, which now verifies that nbblocks is large enough. See 90ff5b1. Workarounds Provide a correctly sized nbblocks buffer. pymonocypher thanks Haris (hextheshadow) for the vulnerability report, details, and recommended fix.

    Recommended action: Upgrade to 4.0.2.8 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.

    Sources:osv.dev (1)github.com (2)Source checked Evidence →