VDB
CVE-2026-3547
CVE-2026-3547
PUBLISHED
CVSS 7.5 HIGH
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.
EPSS 0.05% · 16.8th percentile
Risk Scores
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.05%
16.8th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| wolfSSL | wolfSSL | 0, 0, 0 |
| wolfssl | wolfssl | 0, 0, 0 |
Timeline
- Mar 19, 2026 CVE Published
- Mar 19, 2026 PoC Published
- Mar 19, 2026 PoC Published
- Mar 20, 2026 EPSS Score
- Mar 20, 2026 Coalition ESS Score
- Mar 21, 2026 EPSS Score
- Mar 21, 2026 Coalition ESS Score
- Mar 21, 2026 CVE Updated
- Mar 22, 2026 EPSS Score
- Mar 23, 2026 EPSS Score
- Mar 24, 2026 EPSS Score
- Mar 25, 2026 EPSS Score