CVE-2026-1005: wolfSSL

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

Integer underflow in wolfSSL packet sniffer <= 5.8.4 allows an attacker to cause a buffer overflow in the AEAD decryption path by injecting a TLS record shorter than the explicit IV plus authentication tag into traffic inspected by ssl_DecodePacket. The underflow wraps a 16-bit length to a large value that is passed to AEAD decryption routines, causing heap buffer overflow and a crash. An unauthenticated attacker can trigger this remotely via malformed TLS Application Data records.

Affected products

• wolfSSL wolfSSL: up to and including 5.8.4

Published 2026-03-19. Last modified 2026-06-17.