CVE-2026-15243

The CVE-2026-15243 issue affects the Apereo CAS Client where the client accepts any CA-trusted certificate for a hostname that matches the configured allowlist or regex. The underlying risk is a MITM attacker could present a any CA-signed certificate for a permitted hostname, enabling interceptio...

CVE-2026-15243 Improper Validation of Certificate in CAS Client

Apereo CAS Client accepts any CA-trusted certificate for any hostname, provided the URL the client is calling matches the configured allowlist or regex. An attacker with a MITM position DNS poisoning, rogue Wi-Fi, malicious proxy, etc. can provide any CA-signed certificate for a hostname that...

CVE-2026-15243 Improper Validation of Certificate in CAS Client

Apereo CAS Client accepts any CA-trusted certificate for any hostname, provided the URL the client is calling matches the configured allowlist or regex. An attacker with a MITM position DNS poisoning, rogue Wi-Fi, malicious proxy, etc. can provide any CA-signed certificate for a hostname that...

CVE-2026-15243 Improper Validation of Certificate in CAS Client

Apereo CAS Client accepts any CA-trusted certificate for any hostname, provided the URL the client is calling matches the configured allowlist or regex. An attacker with a MITM position DNS poisoning, rogue Wi-Fi, malicious proxy, etc. can provide any CA-signed certificate for a hostname that...

SUSE CVE-2026-16317

Missing validation of the outer contenttype byte on TLS 1.3 encrypted records in s2n-tls allows an active man-in-the-middle to silently discard individual application data records without either endpoint detecting the modification. RFC 8446 Section 5.2 requires that the outer contenttype of all...

PT-2026-64277

Name of the Vulnerable Software and Affected Versions Apereo CAS Client version 4.1.0 Jasig CAS Client version 3.6.4 Description The software accepts any CA-trusted certificate for any hostname as long as the URL being called matches the configured allowlist or regex. A Man-in-the-Middle MITM...

PT-2026-64407

In epa4all, prior to version 2026-05-20, an attacker on the network path between epa4all and any backend ePA Aktensystem, Konnektor, IDP, TSS can present a self-signed TLS certificate and intercept the connection. For non-VAU connections Konnektor, IDP, this allows direct read and modification of...

JLSEC-2026-778

A flaw was found in libssh. This vulnerability allows local man-in-the-middle attacks, security downgrades of SSH Secure Shell connections, and manipulation of trusted host information, posing a significant risk to the confidentiality, integrity, and availability of SSH communications via an...

PYSEC-2026-3492 OpenStack oslo.messaging does not verify RabbitMQ broker hostname during TLS handshake

An issue was discovered in OpenStack oslo.messaging 1.0.0 through 17.3.0. The oslo.messaging RabbitMQ driver does not perform TLS hostname verification when connecting to the message broker. When sslcafile is configured, the driver enables certificate chain validation but does not pass the expect...

OpenStack oslo.messaging does not verify RabbitMQ broker hostname during TLS handshake

An issue was discovered in OpenStack oslo.messaging 1.0.0 through 17.3.0. The oslo.messaging RabbitMQ driver does not perform TLS hostname verification when connecting to the message broker. When sslcafile is configured, the driver enables certificate chain validation but does not pass the expect...

MITM (Man-in-the-Middle) org.postgresql:postgresql Dependency in Confluence Data Center

This High severity MITM Man-in-the-Middle vulnerability was introduced in versions 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, and 10.1.0 of Confluence Data Center. This MITM Man-in-the-Middle vulnerability, with a CVSS Score of 8.2 and a CVSS Vector of...

MITM (Man-in-the-Middle) org.postgresql:postgresql Dependency in Bitbucket Data Center

This High severity MITM Man-in-the-Middle vulnerability was introduced in versions 9.2.0, 9.3.0, 9.4.0, 9.5.0, and 9.6.0 of Bitbucket Data Center. This MITM Man-in-the-Middle vulnerability, with a CVSS Score of 8.2 and a CVSS Vector of CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:L/SA...

Synology Man-In-The-Middle

Synology stale DNS allows practical interception of traffic from vulnerable DSM clients, making older vulnerabilities more practical to exploit...

PT-2026-64101

An issue was discovered in OpenStack oslo.messaging 1.0.0 through 17.3.0. The oslo.messaging RabbitMQ driver does not perform TLS hostname verification when connecting to the message broker. When ssl ca file is configured, the driver enables certificate chain validation but does not pass the...

gnutls: gnutls: Certificate validation bypass due to oversized Subject Alternative Name

A flaw was found in gnutls. When validating certificates, an oversized Subject Alternative Name SAN could cause the validation process to incorrectly fall back to checking the Common Name CN field. This could allow a remote attacker to bypass proper certificate validation, potentially leading to...

gnutls: gnutls: Security bypass due to incorrect name constraint handling

A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities CAs only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate...

CVE-2026-16317

A flaw was found in s2n-tls, a Transport Layer Security TLS implementation. This vulnerability allows an active man-in-the-middle MITM attacker to silently discard individual application data records in TLS 1.3 connections. The issue stems from missing validation of the outer content type byte in...

Plone < 3.1.8 MitM

The version of Plone installed on the remote host is prior to 3.1.8. It is, therefore, affected by a man-in-the-middle vulnerability. Plone uses invariant data a client username and a server secret when calculating an HMAC-SHA1 value for an authentication cookie, which makes it easier for remote...

Improper Certificate Validation

Overview Affected versions of this package are vulnerable to Improper Certificate Validation due to the internal API HTTP client hardcoding InsecureSkipVerify to true in the TLS configuration, which disables certificate validation for outbound HTTPS connections. An attacker can intercept internal...

Improper Certificate Validation

Overview Affected versions of this package are vulnerable to Improper Certificate Validation due to the internal API HTTP client hardcoding InsecureSkipVerify to true in the TLS configuration, which disables certificate validation for outbound HTTPS connections. An attacker can intercept internal...