CVE-2026-5447 | THREATINT

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.

PUBLISHED Reserved 2026-04-02 | Published 2026-04-09 | Updated 2026-04-10 | Assigner wolfSSL

MEDIUM: 6.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-122 Heap-based Buffer Overflow

Product status

Default status

unaffected

Any version before 5.9.1

affected

Credits

Calif.io in collaboration with Claude and Anthropic Research finder

References

github.com/wolfSSL/wolfssl/pull/10112

cve.org (CVE-2026-5447)

nvd.nist.gov (CVE-2026-5447)

Download JSON