CVE-2026-5447

HIGH

Heap buffer overflow in CertFromX509() via AuthorityKeyIdentifier

Title source: cna

Description

Heap buffer overflow in CertFromX509 via AuthorityKeyIdentifier size confusion. A heap buffer overflow occurs when converting an X.509 certificate internally due to incorrect size handling of the AuthorityKeyIdentifier extension.

References (1)

Core 1

Core References

https://github.com/wolfSSL/wolfssl/pull/10112

Scores

CVSS v3 7.5

EPSS 0.0019

EPSS Percentile 8.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-122

Status published

Products (2)

wolfSSL/wolfSSL < 5.9.1

wolfssl/wolfssl < 5.9.1

Published Apr 09, 2026

Tracked Since Apr 10, 2026