Question 1

What is CVE-2026-6731 — CVE-2026-6731?

Accepted Answer

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.

Question 2

What is the authoritative source for CVE-2026-6731?

Accepted Answer

CVE-2026-6731 (CVE-2026-6731) is catalogued in NVD + CISA KEV + FIRST EPSS and curated for EU compliance use cases by SQUR.

CVE-2026-6731CVE-2026-6731

Description

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