CVE-2026-5772 — MatchDomainName 1-Byte Stack Buffer Over-Read in Hostname Validation
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 acti…
Published: 2026-04-09 · CVSS: 2.1 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7