High severity8.1NVD Advisory· Published Apr 10, 2026· Updated Apr 29, 2026
CVE-2026-5188
CVE-2026-5188
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.
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1- github.com/wolfSSL/wolfssl/pull/10024nvdIssue TrackingPatch
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