CVE-2026-39892

CRITICAL

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 v3.1 Score

9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Published: 4/8/2026Modified: 9/10/2026

Related Intelligence (0)

No articles currently reference this CVE.

References (30)

https://github.com/pyca/cryptography/security/advisories/GHSA-p423-j2cm-9vmqVendor Advisoryhttp://www.openwall.com/lists/oss-security/2026/04/08/12Mailing ListRelease Noteshttps://access.redhat.com/errata/RHSA-2026:19375https://access.redhat.com/errata/RHSA-2026:20338https://access.redhat.com/errata/RHSA-2026:21017https://access.redhat.com/errata/RHSA-2026:22465https://access.redhat.com/errata/RHSA-2026:22629https://access.redhat.com/errata/RHSA-2026:22840https://access.redhat.com/errata/RHSA-2026:23361https://access.redhat.com/errata/RHSA-2026:24483https://access.redhat.com/errata/RHSA-2026:24761https://access.redhat.com/errata/RHSA-2026:24762https://access.redhat.com/errata/RHSA-2026:24853https://access.redhat.com/errata/RHSA-2026:24866https://access.redhat.com/errata/RHSA-2026:24977https://access.redhat.com/errata/RHSA-2026:30088https://access.redhat.com/errata/RHSA-2026:30089https://access.redhat.com/errata/RHSA-2026:37275https://access.redhat.com/errata/RHSA-2026:42644https://access.redhat.com/errata/RHSA-2026:43651https://access.redhat.com/errata/RHSA-2026:43670https://access.redhat.com/errata/RHSA-2026:43851https://access.redhat.com/errata/RHSA-2026:43853https://access.redhat.com/errata/RHSA-2026:43854https://access.redhat.com/errata/RHSA-2026:43855https://access.redhat.com/errata/RHSA-2026:46956https://access.redhat.com/errata/RHSA-2026:7295https://access.redhat.com/security/cve/CVE-2026-39892https://bugzilla.redhat.com/show_bug.cgi?id=2456735https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39892.json