CVE-2026-5188
UNKNOWN
NVD
CVSS Score
0
Severity
UNKNOWN
Published
Apr 10, 2026
Vendor
unknown
Description
An integer underflow issue exists in wolfSSL when parsing the Subject Alternative Name (SAN) extension of X.509 certificates. A malformed certificate can specify an entry length larger than the enclosing sequence, causing the internal length counter to wrap during parsing. This results in incorrect handling of certificate data. The issue is limited to configurations using the original ASN.1 parsing implementation which is off by default.