Security Bulletin:Improper Chain of Trust in Erlang OTP's pubkey_cert Module Allows Certificate Forgery

Summary Improper Following of a Certificate's Chain of Trust vulnerability in Erlang OTP publickey pubkeycert module allows a non-CA certificate to be accepted as an intermediate issuer, enabling certificate chain forgery. In lib/publickey/src/pubkeycert.erl, pubkeycert:validateextensions/7...

CVE-2026-67294

A flaw was found in FreeRDP. During client-side server Transport Layer Security TLS authentication, FreeRDP improperly validates the Extended Key Usage EKU purpose of the peer certificate. This vulnerability allows a certificate intended only for client authentication to be accepted as a server...

Improper Input Validation

Overview Affected versions of this package are vulnerable to Improper Input Validation in the calculateAgreementpub, message method of the DHAgreement class, which raises the peer-supplied message to the power of the local static private key x without any range or subgroup-membership check, while...

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, ...

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-2026-67294 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 prior to 3.29.0 is affected by an EKU bypass in TLS server verification. In x509_utils_verify(), when server-purpose (X509_PURPOSE_SSL_SERVER) validation fails, the code may fall back to client-purpose and any-purpose checks, allowing a certificate valid only for clientAuth to be treated ...

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, ...

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 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, ...

PT-2026-67274

Name of the Vulnerable Software and Affected Versions FreeRDP versions prior to 3.29.0 Description Improper validation of the Extended Key Usage EKU purpose occurs during client-side server TLS authentication. Within the x509 utils verify function, if the server-purpose X509 PURPOSE SSL SERVER...

CVE-2026-67294: Improper Certificate Validation

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, ...

crypto/x509: Usage of ExtKeyUsageAny disables policy validation in crypto/x509

A flaw was found in Go's crypto/x509 package. This vulnerability allows improper certificate validation, bypassing policy constraints via using ExtKeyUsageAny in VerifyOptions.KeyUsages...

crypto/x509: Usage of ExtKeyUsageAny disables policy validation in crypto/x509

A flaw was found in Go's crypto/x509 package. This vulnerability allows improper certificate validation, bypassing policy constraints via using ExtKeyUsageAny in VerifyOptions.KeyUsages...

PT-2026-64100

Unauthenticated Use of Server-Side NetLicensing API Key in HTTP Mode Summary When netlicensing-mcp is run in HTTP transport mode, the ApiKeyMiddleware fails to enforce authentication: requests that carry no client API key are unconditionally forwarded to the next handler server.py:1427. The...

JLSEC-2026-738 Chain intermediate CA:TRUE without keyCertSign accepted as a signing CA

Chain intermediate CA:TRUE without keyCertSign accepted as a signing CA. Intermediate CA certificates are required to have the keyCertSign key usage when a Key Usage extension is present, but chain-supplied temporary CAs WOLFSSLTEMPCA added while building a certificate path were previously exempt...

PYSEC-2026-3051 rfc3161-client Has Improper Certificate Validation

Summary An Authorization Bypass vulnerability in rfc3161-client's signature verification allows any attacker to impersonate a trusted TimeStamping Authority TSA. By exploiting a logic flaw in how the library extracts the leaf certificate from an unordered PKCS7 bag of certificates, an attacker ca...

CVE-2026-55605

DeepSeek MCP Server is an MCP server for DeepSeek V4. Starting in version 1.4.2 and prior to version 1.8.0, the self-hosted HTTP transport of @arikusi/deepseek-mcp-server exposes POST /mcp without any authentication: createMcpExpressApp is called without an authProvider and no middleware guards t...

CVE-2026-55605

DeepSeek MCP Server is an MCP server for DeepSeek V4. Starting in version 1.4.2 and prior to version 1.8.0, the self-hosted HTTP transport of @arikusi/deepseek-mcp-server exposes POST /mcp without any authentication: createMcpExpressApp is called without an authProvider and no middleware guards t...