Security Advisory

CVE-2026-3849

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-03-19 20:29:30

Last updated 2026-03-25 14:21:17

Assigner wolfSSL

State PUBLISHED

Description

Stack Buffer Overflow in wc_HpkeLabeledExtract via Oversized ECH Config. A vulnerability existed in wolfSSL 5.8.4 ECH (Encrypted Client Hello) support, where a maliciously crafted ECH config could cause a stack buffer overflow on the client side, leading to potential remote execution and client program crash. This could be exploited by a malicious TLS server supporting ECH. Note that ECH is off by default, and is only enabled with enable-ech.

← Browse all CVEs View on cve.org ↗