CVE-2026-39892

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 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/pyca/cryptography/security/advisories/GHSA-p423-j2cm-9vmq	Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/04/08/12	Mailing List Release Notes Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:cryptography.io:cryptography:*:*:*:*:*:python:*:*

History

15 Apr 2026, 16:12

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.8
First Time		Cryptography.io cryptography Cryptography.io
References	~~() https://github.com/pyca/cryptography/security/advisories/GHSA-p423-j2cm-9vmq -~~	() https://github.com/pyca/cryptography/security/advisories/GHSA-p423-j2cm-9vmq - Vendor Advisory
References	~~() http://www.openwall.com/lists/oss-security/2026/04/08/12 -~~	() http://www.openwall.com/lists/oss-security/2026/04/08/12 - Mailing List, Release Notes, Third Party Advisory
CPE		cpe:2.3:a:cryptography.io:cryptography::::::python::*

08 Apr 2026, 22:16

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/04/08/12 -

08 Apr 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-08 21:17

Updated : 2026-04-15 16:12

NVD link : CVE-2026-39892

Mitre link : CVE-2026-39892

CVE.ORG link : CVE-2026-39892

JSON object : View

Products Affected

cryptography.io

cryptography

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

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