2026-03-20 · 2 min · BitNinja Team

Understanding the CVE-2026-3549 Vulnerability

The CVE-2026-3549 vulnerability highlights a crucial issue in TLS 1.3 ECH parsing. A heap buffer overflow happens due to an integer underflow during the parsing of the ECH extension. This flaw can allow attackers to write beyond allocated memory bounds, posing a significant ri...