CVE-2026-5447

Heap buffer overflow in CertFromX509() via AuthorityKeyIdentifier

State: Published
Severity: 6.3 Medium
Published: Apr 9, 2026
Updated: Apr 10, 2026
Reserved: Apr 2, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.3 Medium	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	wolfSSL

Weaknesses

CWE-122 Heap-based Buffer Overflow

Affected Products

Product	Versions
wolfSSLwolfSSL	before 5.9.1Affected

References

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

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