K000162337: WolfSSL vulnerability CVE-2026-6731

Security Advisory 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. CVE-2026-6731 Impact There is no impact; F5 products are not affected by this...

JLSEC-2026-755 X.509 name constraint bypass via the Subject Common Name when treated as a DNS-type name

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...

Linux Distros Unpatched Vulnerability : CVE-2026-6731

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

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 name constraints could be accepted...

UBUNTU-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 name constraints could be accepted...

CVE-2026-6731 X.509 name constraint bypass via Subject CN treated as a DNS name

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...

CVE-2026-6731 X.509 name constraint bypass via Subject CN treated as a DNS name

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...

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 name constraints could be accepted...

EUVD-2026-39555

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...

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 name constraints could be accepted...

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 name constraints could be accepted...

CVE-2026-6731

CVE-2026-6731 describes an X.509 name constraint bypass where the Subject CN is treated as a DNS-type name, allowing a certificate to pass DNS constraints if the CN violates them. Public sources (NVD and related feeds) reference this bypass and provide CVSS metrics (v3.1: 7.5, Network, High impac...

CVE-2026-6731 X.509 name constraint bypass via Subject CN treated as a DNS name

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...

CVE-2026-6731: Improper Certificate Validation

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...

SUSE CVE-2010-2074

istream.c in w3m 0.5.2 and possibly other versions, when sslverifyserver is enabled, does not properly handle a '\0' character in a domain name in the 1 subject's Common Name or 2 Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary S...

CXF: SSL hostname verification bypass, incomplete CVE-2012-5783 fix

It was found that the fix for CVE-2012-5783 was incomplete: the code added to check that the server host name matches the domain name in a subject's Common Name CN field in X.509 certificates was flawed. A man-in-the-middle attacker could use this flaw to spoof an SSL server using a specially...

DEBIAN-CVE-2014-3756

The client in Mumble 1.2.x before 1.2.6 allows remote attackers to force the loading of an external file and cause a denial of service hang and resource consumption via a crafted string that is treated as rich-text by a Qt widget, as demonstrated by the 1 user or 2 channel name in a Qt dialog, 3...

AZL-44784 CVE-2013-6444 affecting package pywbem 0.17.6-12

PyWBEM 0.7 and earlier does not verify that the server hostname matches a domain name in the subject's Common Name CN or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate...

jakarta-commons-httpclient: missing connection hostname check against X.509 certificate name

It was found that Apache Commons HttpClient 3.x, as used in Amazon Flexible Payments Service FPS merchant Java SDK and other products, does not verify that the server hostname matches a domain name in the subject's Common Name CN or subjectAltName field of the X.509 certificate, which allows...

axis: missing connection hostname check against X.509 certificate name

Apache Axis did not verify that the server host name matched the domain name in the subject's Common Name CN or subjectAltName field in X.509 certificates. This could allow a man-in-the-middle attacker to spoof an SSL server if they had a certificate that was valid for any domain name...