Is cryptography affected by CVE-2026-39892?

PyPI cryptography is affected in >=45.0.0 <46.0.7.

Is CVE-2026-39892 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

critical

CVE-2026-39892

Q: Is CVE-2026-39892 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

PyPI · cryptography

Summary

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

Severity: critical
EPSS: 0.5% (p40)
Also known as: GHSA-p423-j2cm-9vmq, PYSEC-2026-36
Published: 2026-04-08

References

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

Related advisories

GHSA-537c-gmf6-5ccf — high · PyPI/cryptography
CVE-2026-26007 — high · PyPI/cryptography
CVE-2026-34073 — medium · PyPI/cryptography

Is your project exposed to this? Stateward checks every dependency on every pull request and flags it only if your code actually reaches it.

Check my repo

Summarize with AI

ChatGPT Claude Perplexity

Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.