Security Advisory

CVE-2026-3547

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-03-19 20:20:42

Last updated 2026-03-21 03:33:23

Assigner wolfSSL

State PUBLISHED

Description

Out-of-bounds read in ALPN parsing due to incomplete validation. wolfSSL 5.8.4 and earlier contained an out-of-bounds read in ALPN handling when built with ALPN enabled (HAVE_ALPN / --enable-alpn). A crafted ALPN protocol list could trigger an out-of-bounds read, leading to a potential process crash (denial of service). Note that ALPN is disabled by default, but is enabled for these 3rd party compatibility features: enable-apachehttpd, enable-bind, enable-curl, enable-haproxy, enable-hitch, enable-lighty, enable-jni, enable-nginx, enable-quic.

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