Medium 6.9Published Apr 8, 2026

CVE-2026-39892cryptography has a buffer overflow if non-contiguous buffers were passed to APIs

Updated under an hour ago (Oct 26, 2026, 1:00 PM ET)

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It affects pyca cryptography and 15 other products. Add what you run to find out whether that includes you.

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Every CVE for pyca cryptography

Exploited in the last 30 days

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: 6.9 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
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: GitHub_M
NVD analysis: Modified
Record last updated: Sep 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

pyca cryptography pyca:cryptography (from the name)	from 45.0.0, < 46.0.7	CNA record
Red Hat Red Hat Ansible Automation Platform 2.5 for RHEL 8 redhat:ansible_automation_platform	from 0:4.6.29-2.el8ap not affected	CISA ADP
Red Hat Red Hat AI Inference Server 3.3 redhat:ai_inference_server	from 1782353093 not affected	CISA ADP
Red Hat Red Hat Discovery 2 redhat:discovery	from 1779395228 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux AI 3.3 redhat:enterprise_linux_ai	from 1784670204 not affected	CISA ADP
Red Hat Red Hat Hardened Images redhat:hummingbird	from 46.0.7-1.hum1 not affected	CISA ADP
Red Hat Red Hat OpenShift AI 2.25 redhat:openshift_ai	from 1780069069 not affected	CISA ADP
Red Hat Red Hat Quay 3.10 redhat:quay	from 1779822261 not affected	CISA ADP
Red Hat Red Hat Trusted Artifact Signer 1.4 redhat:trusted_artifact_signer	from 1780914886 not affected	CISA ADP
Red Hat Lightspeed Core redhat:lightspeed_core	All versions	CISA ADP
1–10 of 16

References

References

https://github.com/pyca/cryptography/security/advisories/GHSA-p423-j2cm-9vmq	x-refsource-confirm, vendor-advisory
http://www.openwall.com/lists/oss-security/2026/04/08/12	mailing-list, release-notes, third-party-advisory
https://access.redhat.com/errata/RHSA-2026:19375
https://access.redhat.com/errata/RHSA-2026:20338
https://access.redhat.com/errata/RHSA-2026:21017
https://access.redhat.com/errata/RHSA-2026:22465
https://access.redhat.com/errata/RHSA-2026:22629
https://access.redhat.com/errata/RHSA-2026:22840
https://access.redhat.com/errata/RHSA-2026:23361
https://access.redhat.com/errata/RHSA-2026:24483
1–10 of 25

The CVE record on cve.org NVD's entry

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.