CVE-2026-88647

A flaw was found in GnuTLS. This vulnerability can lead to information disclosure by allowing an attacker to bypass certificate hostname verification. A remote attacker presenting a crafted certificate can circumvent the Common Name fallback check, enabling them to eavesdrop on or intercept...

AZL-105687 CVE-2026-19553 affecting package python3 3.12.14-2

ssl.SSLContext.wrapbio didn't require the serverhostname argument to not be None if ssl.SSLContext.checkhostname was set. Due to a missing parameter check in SSLObject, if the serverhostname argument isn't supplied then hostname verification would be silently skipped. This defect could lead to...

CVE-2026-19553

ssl.SSLContext.wrapbio didn't require the serverhostname argument to not be None if ssl.SSLContext.checkhostname was set. Due to a missing parameter check in SSLObject, if the serverhostname argument isn't supplied then hostname verification would be silently skipped. This defect could lead to...

CVE-2026-19553: Improper Validation of Certificate with Host Mismatch

ssl.SSLContext.wrapbio didn't require the serverhostname argument to not be None if ssl.SSLContext.checkhostname was set. Due to a missing parameter check in SSLObject, if the serverhostname argument isn't supplied then hostname verification would be silently skipped. This defect could lead to...

Medium: containerd

Issue Overview: x509.Certificate.VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name SAN entries. This caused strings.Splithost, "." to execute repeatedly on the same input hostname. With a large DNS SAN list, verification costs scaled quadratically bas...

Important: ecs-init

Issue Overview: Parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service. CVE-2026-25680 Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt ...

Important: docker

Issue Overview: x509.Certificate.VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name SAN entries. This caused strings.Splithost, "." to execute repeatedly on the same input hostname. With a large DNS SAN list, verification costs scaled quadratically bas...

Amazon Linux 2023 : compat-golang-github-cpuguy83-md2man-2-devel, golang-github-cpuguy83-md2man, golang-github-cpuguy83-md2man-devel (ALAS2023-2026-1875)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1875 advisory. x509.Certificate.VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name SAN entries. This caused strings.Splithost, . to execute repeatedly on the same...

EUVD-2026-34038

x509.Certificate.VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name SAN entries. This caused strings.Splithost, "." to execute repeatedly on the same input hostname. With a large DNS SAN list, verification costs scaled quadratically based on the number...

Linux Distros Unpatched Vulnerability : CVE-2026-27145

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - x509.Certificate.VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name SAN entries. This caused strings.Splithost, . t...

EUVD-2012-5676

Malware in sbrugna...

CVE-2022-27890

It was discovered that the sls-logging was not verifying hostnames in TLS certificates due to a misuse of the javax.net.ssl.SSLSocketFactory API. A malicious attacker in a privileged network position could abuse this to perform a man-in-the-middle attack. A successful man-in-the-middle attack wou...

CVE-2021-40829

Connections initialized by the AWS IoT Device SDK v2 for Java versions prior to 1.4.2, Python versions prior to 1.6.1, C++ versions prior to 1.12.7 and Node.js versions prior to 1.5.3 did not verify server certificate hostname during TLS handshake when overriding Certificate Authorities CA in the...

PT-2021-22964

Name of the Vulnerable Software and Affected Versions AWS IoT Device SDK v2 for Java versions prior to 1.3.3 AWS IoT Device SDK v2 for Python versions prior to 1.5.18 AWS IoT Device SDK v2 for C++ versions prior to 1.12.7 AWS IoT Device SDK v2 for Node.js versions prior to 1.5.3 Description...

PT-2021-22965

Name of the Vulnerable Software and Affected Versions AWS IoT Device SDK v2 for Java versions prior to 1.4.2 AWS IoT Device SDK v2 for Python versions prior to 1.6.1 AWS IoT Device SDK v2 for C++ versions prior to 1.12.7 AWS IoT Device SDK v2 for Node.js versions prior to 1.5.3 AWS-C-IO version...

Security Bulletin: Multiple vulnerabilities in IBM Java Runtime affect Rational Directory Server (Tivoli) & Rational Directory Administrator

Summary There are multiple vulnerabilities in IBM® Runtime Environment Java™ Version 7 and Version 8 used by Rational Directory Server Tivoli and Rational Directory Administrator. These issues were disclosed as part of the IBM Java SDK updates in March 2020. Upgrade the JRE in order to resolve...

GHSA-R53V-VM87-F72C Improper Validation of Certificates in apache axis

The getCN function in Apache Axis 1.4 and earlier does not properly 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 a certificate with a subjec...

PYSEC-2015-1

Ansible before 1.9.2 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...

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...

PYSEC-2012-12

Apache Libcloud before 0.11.1 uses an incorrect regular expression during verification of whether 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 a crafted...