Riskcovery

CVE-2026-39892

cryptography has a buffer overflow if non-contiguous buffers were passed to APIs

State
Published
Severity
6.9 Medium
Published
Apr 8, 2026
Updated
Sep 10, 2026
Reserved
Apr 7, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
4.06.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NGitHub_M
3.17.3 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lredhat-SADP

Weaknesses

  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-131 Incorrect Calculation of Buffer Size

Affected Products

ProductVersions
cryptographypyca
  • >= 45.0.0, < 46.0.7Affected

References

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