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.
{
"sources": [
{
"id": "CVE-2026-3547",
"database_specific": {
"status": "Analyzed"
},
"imported": "2026-07-14T21:22:49.133Z",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-3547",
"modified": "2026-06-17T10:43:45.970Z",
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3547",
"published": "2026-03-19T21:17:12.653Z"
},
{
"id": "GHSA-f377-557w-vjgv",
"imported": "2026-07-14T21:22:55.789Z",
"url": "https://api.github.com/advisories/GHSA-f377-557w-vjgv",
"modified": "2026-03-19T21:30:31Z",
"html_url": "https://github.com/advisories/GHSA-f377-557w-vjgv",
"published": "2026-03-19T21:30:25Z"
},
{
"id": "EUVD-2026-13166",
"imported": "2026-07-14T21:22:51.772Z",
"url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-13166",
"modified": "2026-03-21T03:33:23Z",
"html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-13166",
"published": "2026-03-19T20:20:42Z"
}
],
"license": "CC-BY-4.0"
}