MEDIUM 6.3 NVD

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

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.

References

https://github.com/wolfSSL/wolfssl/pull/10837

Published: 2026-09-27 · Source: NVD · Feed updated: 2026-09-27

This medium severity vulnerability with a CVSS score of 6.3 was published on 2026-09-27 via NVD.

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