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...

RHEL 10 : osbuild-composer (RHSA-2026:49526)

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:49526 advisory. A service for building customized OS artifacts, such as VM images and OSTree commits, that uses osbuild under the hood. Besides building...

PT-2026-67451

A certification validation weakness exists in communication between affected Omada devices and cloud controllers. Certificate identity verification does not adequately validate that a presented certificate corresponds to the expected cloud controller hostname, which may allow certificate validati...

Linux Distros Unpatched Vulnerability : CVE-2026-66402

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - FreeRDP before 3.29.0 affected versions = 3.28.0 contains multiple TLS certificate identity validation weaknesses in tlsverifycertificate, tlsmatchhostname, and...

Linux Distros Unpatched Vulnerability : CVE-2026-67294

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - FreeRDP before 3.29.0 improperly validates the Extended Key Usage EKU purpose of the peer certificate during client-side server TLS authentication. In...

CVE-2026-66402

FreeRDP before 3.29.0 affected versions = 3.28.0 contains multiple TLS certificate identity validation weaknesses in tlsverifycertificate, tlsmatchhostname, and x509utilsgetdnsnames. Because FreeRDP performs custom Common Name and DNS SAN string matching instead of using OpenSSL's length-aware...

UBUNTU-CVE-2026-67294

FreeRDP before 3.29.0 improperly validates the Extended Key Usage EKU purpose of the peer certificate during client-side server TLS authentication. In x509utilsverify, when server-purpose X509PURPOSESSLSERVER verification fails, the code falls back to client-purpose and any-purpose verification, ...

CVE-2026-66402

FreeRDP before 3.29.0 affected versions = 3.28.0 contains multiple TLS certificate identity validation weaknesses in tlsverifycertificate, tlsmatchhostname, and x509utilsgetdnsnames. Because FreeRDP performs custom Common Name and DNS SAN string matching instead of using OpenSSL's length-aware...

EUVD-2026-51842

FreeRDP before 3.29.0 improperly validates the Extended Key Usage EKU purpose of the peer certificate during client-side server TLS authentication. In x509utilsverify, when server-purpose X509PURPOSESSLSERVER verification fails, the code falls back to client-purpose and any-purpose verification, ...

CVE-2026-67294 FreeRDP before 3.29.0 TLS Certificate EKU Bypass

FreeRDP before 3.29.0 improperly validates the Extended Key Usage EKU purpose of the peer certificate during client-side server TLS authentication. In x509utilsverify, when server-purpose X509PURPOSESSLSERVER verification fails, the code falls back to client-purpose and any-purpose verification, ...

CVE-2026-67294

FreeRDP before 3.29.0 improperly validates the Extended Key Usage EKU purpose of the peer certificate during client-side server TLS authentication. In x509utilsverify, when server-purpose X509PURPOSESSLSERVER verification fails, the code falls back to client-purpose and any-purpose verification, ...

CVE-2026-66402

CVE-2026-66402 affects FreeRDP up to and including 3.28.x, fixed in 3.29.0. The issue arises from TLS identity validation weaknesses in tls_verify_certificate(), tls_match_hostname(), and x509_utils_get_dns_names(). FreeRDP uses custom Common Name and DNS SAN matching instead of OpenSSL’s length-...

CVE-2026-67293

FreeRDP prior to 3.29.0 (affected versions ≤ 3.28.0) contains an improper certificate hostname validation vulnerability. The TLS hostname matcher (tls_match_hostname() in libfreerdp/crypto/tls.c) treats a wildcard pattern such as *.example.com as matching any hostname ending in .example.com, allo...

CVE-2026-67293 FreeRDP before 3.29.0 Improper Certificate Hostname Validation

FreeRDP before 3.29.0 affected versions = 3.28.0 contains an improper certificate hostname validation vulnerability. The TLS hostname matcher tlsmatchhostname in libfreerdp/crypto/tls.c treats a wildcard pattern such as .example.com as matching any hostname ending in .example.com, so it incorrect...

CVE-2026-67293 FreeRDP before 3.29.0 Improper Certificate Hostname Validation

FreeRDP before 3.29.0 affected versions = 3.28.0 contains an improper certificate hostname validation vulnerability. The TLS hostname matcher tlsmatchhostname in libfreerdp/crypto/tls.c treats a wildcard pattern such as .example.com as matching any hostname ending in .example.com, so it incorrect...

Erlang/OTP 17.0 < 27.3.4.15 / 28.0 < 28.5.0.4 / 29.0 < 29.0.4 Multiple Vulnerabilities

The version of Erlang/OTP installed on the remote host is 17.0 prior to 27.3.4.15, 28.0 prior to 28.5.0.4, or 29.0 prior to 29.0.4. It is, therefore, affected by multiple vulnerabilities: - The Erlang/OTP ssl TLS 1.2 and earlier and DTLS client does not verify that the cipher suite selected by th...

Security Bulletin: Multiple vulnerabilities impact AIX due to CURL libcurl (CVE-2026-10536, CVE-2026-11856, CVE-2026-8286, CVE-2026-8458, CVE-2026-8924, CVE-2026-8927, CVE-2026-8932, CVE-2026-9547).

Summary Multiple vulnerabilities in the curl/libcurl are related to use-after-free, reusing an invalid connection, bypass Public Suffix List checks, improper host key validation and invalid authorization. Vulnerability Details CVEID:CVE-2026-10536 DESCRIPTION: A use-after-free vulnerability exist...

SUSE CVE-2026-59251

Allocation of resources without limits in Erlang/OTP publickey certificate path validation allows a remote unauthenticated attacker to cause denial of service by sending a crafted X.509 certificate chain during the TLS handshake. During RFC 5280 policy processing in publickey:pkixpathvalidation/3...

Improper Certificate Validation

Overview Affected versions of this package are vulnerable to Improper Certificate Validation due to the HTTPS Agent skipping hostname verification across identity policies. An attacker can intercept or manipulate encrypted communications by exploiting TLS session reuse without proper hostname...

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...