CVE-2026-3547
wolfSSL: out-of-bounds read (DoS) in ALPN parsing due to incomplete validation
- State
- Published
- Severity
- 7.5 High
- Published
- Mar 19, 2026
- Updated
- Mar 21, 2026
- Reserved
- Mar 4, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | wolfSSL |
Weaknesses
- CWE-125 out-of-bounds read
Affected Products
| Product | Versions |
|---|---|
wolfSSLwolfSSL |
|
References
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