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Critical 9.8Published Apr 8, 2026

CVE-2026-39892cryptography is a package designed to expose cryptographic primitives and recipes to Python developers.

Updated under an hour ago ()

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It affects cryptography.io cryptography. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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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.

CVSS
9.8 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE)
CWE-119, CWE-131
Known exploited
Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days)
Not loaded for this CVE
Assigned by
Not given
NVD analysis
Modified
Record last updated
Sep 10, 2026
First seen by InfoSec Signals
Oct 9, 2026

Affected products

Affected products
cryptography.io cryptography
cryptography.io:cryptography
from 45.0.0 before 46.0.7
NVD

References

  • vendor-advisory
  • mailing-list, release-notes, third-party-advisory

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.

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