netty-handler: Netty: Improper trust manager handling leads to hostname verification bypass

A flaw was found in Netty, a network application framework. This vulnerability allows a remote attacker to bypass hostname verification due to improper handling of user-supplied trust managers. When a client is configured with a plain X.509 Trust Manager X509TrustManager, it fails to perform...

CVE-2026-47840

CVE-2026-47840 concerns LDAP StartTLS with UAA: a network attacker between UAA and its LDAP directory can impersonate the directory using any trusted certificate, harvest LDAP bind passwords and end-user passwords during simple-bind, and return forged group memberships that grant admin scopes. Af...

CVE-2026-47840 LDAP StartTLS unconditionally disables hostname verification

A network attacker positioned between UAA and its LDAP directory can impersonate the directory using any certificate from any trusted CA, then harvest the LDAP bind password and every end-user password sent during simple-bind authentication, and return forged group memberships that grant themselv...

CVE-2026-47840 - LDAP StartTLS unconditionally disables hostname verification | Cloud Foundry

Severity High CVSS score: 8.3 High CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS score: 7.5 High CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N/RL:O Vendor CloudFoundry Foundation Versions Affected Severity is High unless otherwise noted. UAA All versions prior to v78.13.0...

crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries

A flaw was found in the crypto/x509 package of golang. This vulnerability allows a remote attacker to cause a Denial of Service DoS by presenting a specially crafted X.509 certificate with a large number of DNS Subject Alternative Name SAN entries. The certificate verification process, specifical...

Security Bulletin: Multiple vulnerabilities affect Data Virtualization on IBM Software Hub (June 2026 - Part 1 of 2)

Summary Multiple vulnerabilities have been addressed in Data Virtualization on IBM Software Hub. Note that Data Virtualization was named Watson Query on IBM Cloud Pak for Data version 4.8. Vulnerability Details CVEID:CVE-2026-50010 DESCRIPTION: Netty is a network application framework for...

Apache ZooKeeper: Apache ZooKeeper: Impersonation of servers or clients via reverse DNS spoofing

A flaw was found in Apache ZooKeeper. The ZKTrustManager component's hostname verification process can fall back to reverse DNS PTR lookup when IP Subject Alternative Name SAN validation fails. This vulnerability allows an attacker who can control or spoof PTR records to impersonate ZooKeeper...

netty-handler: Netty: Improper trust manager handling leads to hostname verification bypass

A flaw was found in Netty, a network application framework. This vulnerability allows a remote attacker to bypass hostname verification due to improper handling of user-supplied trust managers. When a client is configured with a plain X.509 Trust Manager X509TrustManager, it fails to perform...

curl: mbedTLS / wolfSSL / rustls backends silently skip hostname verification when CURLOPT_SSL_VERIFYPEER=0

Summary When an application sets CURLOPTSSLVERIFYPEER=0 while keeping CURLOPTSSLVERIFYHOST=2 the default, the mbedTLS, wolfSSL, and rustls TLS backends silently skip the hostname-vs-certificate check. The OpenSSL, GnuTLS, and Schannel backends correctly preserve hostname checking under the same...

CVE-2026-44393

A flaw was found in OpenStack oslo.messaging. The RabbitMQ driver does not properly verify the hostname of the message broker when establishing a TLS Transport Layer Security connection. An attacker capable of intercepting control-plane network traffic can exploit this vulnerability to impersonat...

Security Bulletin: IBM Sterling External Authentication Server is vulnerable to multiple issues

Summary Multiple vulnerabilities affect IBM Sterling External Authentication Server and are addressed in the latest release and ifix Vulnerability Details CVEID:CVE-2026-2332 DESCRIPTION: In Eclipse Jetty, the HTTP/1.1 parser is vulnerable to request smuggling when chunk extensions are used,...

Security Bulletin: Multiple Vulnerabilities affects IBM License Metric Tool v9

Summary Multiple vulnerabilities have been addressed in components used by IBM License Metric Tool Vulnerability Details CVEID:CVE-2026-34477 DESCRIPTION: The fix for CVE-2025-68161 https://logging.apache.org/security.htmlCVE-2025-68161 was incomplete: it addressed hostname verification only when...

OPENSUSE-SU-2026:21145-1 Security update for mbedtls-2

This update for mbedtls-2 fixes the following issues: Changes in mbedtls-2: - Enable SRTP and DTLS protocols needed by some software. - Update to version 2.28.10: Default behavior changes In TLS clients, if mbedtlssslsethostname has not been called, mbedtlssslhandshake now fails with...

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...

Amazon Linux 2023 : golang-github-burntsushi-toml-test, golang-github-burntsushi-toml-test-devel (ALAS2023-2026-1876)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1876 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...

Amazon Linux 2023 : golang-github-burntsushi-toml, golang-github-burntsushi-toml-devel (ALAS2023-2026-1877)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1877 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...

Amazon Linux 2023 : soci-snapshotter (ALAS2023-2026-1884)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1884 advisory. 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...

Important: Red Hat Security Advisory: Red Hat build of Apache Camel 4.18 for Quarkus 3.33 security update

A security update for Red Hat build of Apache Camel 4.18 for Quarkus 3.33 is now available. This text-only errata provides information about enhancements that improve your developer experience and ensure the security and stability of your applications. Red Hat Product Security has rated this upda...

netty-handler: Netty: Improper trust manager handling leads to hostname verification bypass

A flaw was found in Netty, a network application framework. This vulnerability allows a remote attacker to bypass hostname verification due to improper handling of user-supplied trust managers. When a client is configured with a plain X.509 Trust Manager X509TrustManager, it fails to perform...

netty-handler: Netty: Improper trust manager handling leads to hostname verification bypass

A flaw was found in Netty, a network application framework. This vulnerability allows a remote attacker to bypass hostname verification due to improper handling of user-supplied trust managers. When a client is configured with a plain X.509 Trust Manager X509TrustManager, it fails to perform...