CVE-2026-5447
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductWolfssl
PublishedApr 9, 2026
First seenApr 9, 2026
Weakness typeCWE-122CWE-122
How to fix
Update
- wolfssl wolfssl5.9.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| wolfssl wolfssl | v < 5.9.1 | 5.9.1 |
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