This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-6731 →

DEBIAN-CVE-2026-6731

X.509 name constraint bypass via the Subject Common Name when treated as a DNS-type name. A certificate whose Subject CN violates an issuing CA's DNS...

Original description

The description as published by the source.

X.509 name constraint bypass via the Subject Common Name when treated as a DNS-type name. A certificate whose Subject CN violates an issuing CA's DNS name constraints could be accepted.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 wolfssl

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.5.4-2+deb12u3"}]}]

Debian:13 wolfssl

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.7.2-0.1+deb13u2"}]}]

References

advisory security-tracker.debian.org