pyca cryptography up to 46.0.6 memory corruption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in pyca cryptography up to 46.0.6. This impacts an unknown function. Executing a manipulation can lead to memory corruption. The identification of this vulnerability is CVE-2026-39892. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in pyca cryptography up to 46.0.6. This vulnerability affects an unknown part. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-39892 since 04/07/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 305732 (Linux Distros Unpatched Vulnerability : CVE-2026-39892), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 46.0.7 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (305732) and CERT Bund (WID-SEC-2026-1434). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • IBM App Connect Enterprise

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 305732
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-39892

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: cryptography 46.0.7

Timelineinfo

04/07/2026 CVE reserved
04/09/2026 +2 days Advisory disclosed
04/09/2026 +0 days VulDB entry created
07/28/2026 +110 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-p423-j2cm-9vmq
Status: Confirmed

CVE: CVE-2026-39892 (🔒)
GCVE (CVE): GCVE-0-2026-39892
GCVE (VulDB): GCVE-100-356464
CERT Bund: WID-SEC-2026-1434 - IBM App Connect Enterprise Certified Container: Mehrere Schwachstellen

Entryinfo

Created: 04/09/2026 02:40
Updated: 07/28/2026 18:02
Changes: 04/09/2026 02:40 (67), 04/12/2026 20:24 (2), 05/09/2026 04:49 (7), 07/02/2026 05:08 (11), 07/28/2026 18:02 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Might our Artificial Intelligence support you?

Check our Alexa App!