CVE-2026-5447 MEDIUM

CVE-2026-5447: Heap buffer overflow in CertFromX509() via AuthorityKeyIdentifier

Vendor Wolfssl
Product wolfSSL
Weakness CWE-122
Published April 9, 2026
Last update April 10, 2026
View on NVD All CVEs

CVSS base score

6.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 9, 2026 CVE published
April 10, 2026 Record updated