CVE-2026-39892CRITICAL 9.8EPSS p40.3%

CVE-2026-39892CVE-2026-39892

Description

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. From 45.0.0 to before 46.0.7, if a non-contiguous buffer was passed to APIs which accepted Python buffers (e.g. Hash.update()), this could lead to buffer overflows. This vulnerability is fixed in 46.0.7.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.53% probability of exploitation · percentile 40.3% · 2026-06-19T12:03:05Z
Published2026-04-08
Last modified2026-04-15

Underlying weaknesses· 1

CWE-119

References

  1. https://github.com/pyca/cryptography/security/advisories/GHSA-p423-j2cm-9vmq
  2. http://www.openwall.com/lists/oss-security/2026/04/08/12

1

TypeTargetConfidenceTier
WeaknessImproper Restriction of Operations within the Bounds of a Memory Buffercwe-1190%live

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