CVE-2026-5772
MEDIUMMatchDomainName 1-Byte Stack Buffer Over-Read in Hostname Validation
Title source: cnaDescription
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
Core References
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