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.

INFO

Published Date :

2026-03-19T20:29:30.839Z

Last Modified :

2026-03-19T20:29:30.839Z

Source :

wolfSSL
AFFECTED PRODUCTS

The following products are affected by CVE-2026-3849 vulnerability.

Vendors Products
Wolfssl
  • Wolfssl
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-3849.

URL Resource
https://github.com/wolfSSL/wolfssl/pull/9737 cve-icon cve-icon
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