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Findings

CVE-2026-5447

Heap buffer overflow in CertFromX509 via AuthorityKeyIdentifier size confusion.

Published Apr 9, 2026 · updated Jun 17, 2026 · wolfssl wolfssl

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.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 9, 2026 · NIST NVD

    Detected

    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.

  2. Jun 17, 2026 · NIST NVD

    Updated

    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.

Affected

  • cpe wolfssl/wolfsslversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-5447

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-5447

    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.

    nvd.nist.gov

References