This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-89134 →

DEBIAN-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....

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 wolfssl

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 wolfssl

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

References

advisory security-tracker.debian.org