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High severity7.5OSV Advisory· Published Jun 25, 2026· Updated Jun 27, 2026

CVE-2026-6731

CVE-2026-6731

Description

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.

Affected products

3
  • WolfSSL/WolfsslOSV3 versions
    v5.9.1-stable, v5.9.0-stable, v5.8.4-stable, …+ 2 more
    • (no CPE)range: v5.9.1-stable, v5.9.0-stable, v5.8.4-stable, …
    • cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*range: >=3.9.10,<5.9.2
    • (no CPE)

Patches

Vulnerability mechanics

References

2

News mentions

0

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