CVE-2026-89134

A certificate with no dNSName SAN but another SAN type present (e.g. registeredID or iPAddress) bypassed the Subject CN dNSName name-constraint check. The CN-as-DNS fallback was gated on cert->subjectCN != NULL && cert->altNames == NULL && !cert->isCA instead of "no dNSName SAN", so an out-of-scope CN was accepted. This incomplete fix from CVE-2026-6731, leading to the name-constraint check issue, was introduced in wolfSSL version 5.9.2.

Score
CVSS 3.1 9.1 Critical
Status
Analyzed - facts@wolfssl.com
Published
2026-09-27
Last modified
2026-10-02
Weaknesses
CWE-295

Affected products

References

 
 
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