CVE-2026-89134

A certificate with no dNSName SAN but another SAN type present (e.g. r ...

Published 27 Sep 2026Modified 2 Oct 2026CWE 295

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD.

Description

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.

Affected packages and fixed versions

Source	Package	Fixed in
alpine 3.24	wolfssl	5.9.4-r0
alpine edge	wolfssl	5.9.4-r0
debian 11	wolfssl	no fix listed
debian 12	wolfssl	no fix listed
debian 13	wolfssl	no fix listed
echo	wolfssl	no fix listed
rapidfort debian 12	wolfssl	0:5.9.2-1.1
rapidfort debian 13	wolfssl	0:5.9.2-1.1

References

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

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Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.