CVE-2026-5772

MEDIUM

MatchDomainName 1-Byte Stack Buffer Over-Read in Hostname Validation

Title source: cna
STIX 2.1

Description

A 1-byte stack buffer over-read was identified in the MatchDomainName function (src/internal.c) during wildcard hostname validation when the LEFT_MOST_WILDCARD_ONLY flag is active. If a wildcard * exhausts the entire hostname string, the function reads one byte past the buffer without a bounds check, which could cause a crash.

References (1)

Core 1

Scores

CVSS v3 5.3
EPSS 0.0023
EPSS Percentile 13.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-126
Status published
Products (2)
wolfSSL/wolfSSL < 5.9.0
wolfssl/wolfssl < 5.9.1
Published Apr 09, 2026
Tracked Since Apr 10, 2026