PT-2026-46260

Name of the Vulnerable Software and Affected Versions oslo.messaging versions 1.0.0 through 17.3.0 Description The RabbitMQ driver in oslo.messaging fails to perform TLS hostname verification when connecting to the message broker. While the driver enables certificate chain validation when ssl ca...

EUVD-2026-34294

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...

Improper Certificate Validation

Overview oslo.messaging is an Oslo Messaging API Affected versions of this package are vulnerable to Improper Certificate Validation in the TLS connection establishment process due to missing hostname verification in the RabbitMQ driver. An attacker can compromise the confidentiality and integrit...

crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption

A flaw was found in the crypto/tls component. This vulnerability occurs during Transport Layer Security TLS session resumption when certificate authority CA settings are modified between the initial and resumed handshakes. An attacker could exploit this to bypass certificate validation, allowing ...

crypto/x509: Incorrect enforcement of email constraints in crypto/x509

A certificate validation flaw has been discovered in the golang crypto/x509 module. When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly...

HSEC-2026-0008 crypton-x509-validation and crypton-x509 do not enforce X.509 Name Constraints

crypton-x509-validation and crypton-x509 do not enforce X.509 Name Constraints The crypton-x509-validation and crypton-x509 libraries did not enforce the X.509 Name Constraints extension during certificate validation. The Name Constraints extension is a critical X.509 extension that restricts the...

CVE-2026-42789

A flaw was found in Erlang OTP's publickey module. This vulnerability CWE-295, related to improper certificate validation, allows a non-Certificate Authority CA certificate to be accepted as an intermediate issuer. A remote attacker, holding an end-entity certificate issued by a trusted CA, can...

crypto/x509: Incorrect enforcement of email constraints in crypto/x509

A certificate validation flaw has been discovered in the golang crypto/x509 module. When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly...

crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption

A flaw was found in the crypto/tls component. This vulnerability occurs during Transport Layer Security TLS session resumption when certificate authority CA settings are modified between the initial and resumed handshakes. An attacker could exploit this to bypass certificate validation, allowing ...

crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation

A flaw was found in Go's crypto/x509 package. A remote attacker could exploit this by presenting a specially crafted certificate chain containing a large number of policy mappings. This inefficient validation process consumes excessive resources, which can lead to a denial of service DoS for...

PT-2026-46040

Name of the Vulnerable Software and Affected Versions crypton-x509-validation versions prior to 1.9.1 crypton-x509 versions prior to 1.9.1 x509 affected versions not specified x509-validation affected versions not specified Description The crypton-x509-validation and crypton-x509 libraries fail t...

PT-2026-45962

crypton-x509-validation and crypton-x509 do not enforce X.509 Name Constraints The crypton-x509-validation and crypton-x509 libraries did not enforce the X.509 Name Constraints extension during certificate validation. The Name Constraints extension is a critical X.509 extension that restricts the...

CVE-2026-27145 Inefficient candidate hostname parsing in crypto/x509

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...

Important: Red Hat Security Advisory: Red Hat Lightspeed (formerly Insights) for Runtimes security update

An update is now available for Red Hat Lightspeed formerly Insights for Runtimes on RHEL 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each...

crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption

A flaw was found in the crypto/tls component. This vulnerability occurs during Transport Layer Security TLS session resumption when certificate authority CA settings are modified between the initial and resumed handshakes. An attacker could exploit this to bypass certificate validation, allowing ...

Security Bulletin: IBM Engineering Systems Design Rhapsody TestConductor was affected by CVE-2012-5783, CVE-2012-6153

Summary IBM Engineering Systems Design Rhapsody TestConductor was vulnerable to man-in-the-middle attacks caused by not verifying that the server hostname matches a domain name in the subject's Common Name CN or subjectAltName field of the X.509 certificate. This allows man-in-the-middle attacker...

Important: Red Hat Security Advisory: java-21-ibm-semeru-certified-jdk security update

An update for java-21-ibm-semeru-certified-jdk is now available for Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 10, and Red Hat Enterprise Linux 10.2 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Importan...

EUVD-2024-54938

Improper Validation of Certificate with Host Mismatch vulnerability in Akınsoft QR Menü allows HTTP Response Splitting. This issue affects QR Menü: from s1.05.05 before v1.05.12...

crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation

A flaw was found in Go's crypto/x509 package. A remote attacker could exploit this by presenting a specially crafted certificate chain containing a large number of policy mappings. This inefficient validation process consumes excessive resources, which can lead to a denial of service DoS for...

Improper Certificate Validation

Overview Affected versions of this package are vulnerable to Improper Certificate Validation in the airflow.utils.email process. An attacker can intercept sensitive information, such as SMTP authentication credentials and email contents, by performing a man-in-the-middle attack during the STARTTL...