EUVD-2026-36765

In OCaml-TLS before 2.1.0, the server implementation does insufficient checks of the certificate provided by the client when doing client authentication, which allows impersonation with certificates that are not meant for client authentication because of KeyUsage and ExtendedKeyUsage...

CVE-2026-45389

In OCaml-TLS before 2.1.0, the server implementation does insufficient checks of the certificate provided by the client when doing client authentication, which allows impersonation with certificates that are not meant for client authentication because of KeyUsage and ExtendedKeyUsage...

CVE-2026-45389

Summary (OCaml-TLS CVE-2026-45389): OCaml-TLS versions before 2.1.0 fail to properly validate KeyUsage and ExtendedKeyUsage on client certificates during mutual TLS, allowing impersonation with certificates intended for server authentication. The issue arises in the server-side certificate valida...

CVE-2026-45389

In OCaml-TLS before 2.1.0, the server implementation does insufficient checks of the certificate provided by the client when doing client authentication, which allows impersonation with certificates that are not meant for client authentication because of KeyUsage and ExtendedKeyUsage...

CVE-2026-45389

In OCaml-TLS before 2.1.0, the server implementation does insufficient checks of the certificate provided by the client when doing client authentication, which allows impersonation with certificates that are not meant for client authentication because of KeyUsage and ExtendedKeyUsage...

CVE-2026-48107

Russh (Rust SSH client/server) is affected in versions 0.37.0–0.60.x where the client’s keyboard-interactive auth path accepts an attacker-controlled prompt count via USERAUTH_INFO_REQUEST. The code uses the raw count directly in Vec::with_capacity(...) before verifying sufficient prompt data, en...

TencentOS Server 4: storm (TSSA-2026:0414)

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2026:0414 advisory. Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:...

CVE-2026-46389 UDS Identity Config has a client authentication bypass in `ClientIdAndKubernetesSecretAuthenticator`

UDS Identity Config builds the Keycloak configuration image realm, plugins, theme, truststore, JARs consumed by UDS Core's Identity deployment. In versions 0.11.0 through 0.26.0, a logic error in the client-kubernetes-secret Keycloak client authenticator shipped by uds-identity-config and consume...

CVE-2026-46389

CVE-2026-46389 affects UDS Identity Config (Keycloak integration) used by UDS Core Identity. A logic error in the Keycloak client authenticator named client-kubernetes-secret (shipped by uds-identity-config) in versions 0.11.0–0.26.0 overwrites the submitted client_secret with the mounted Kuberne...

PT-2026-47027

Name of the Vulnerable Software and Affected Versions UDS Identity Config versions 0.11.0 through 0.26.0 Description A logic error exists in the client-kubernetes-secret Keycloak client authenticator. This error causes the submitted client secret to be overwritten with the mounted Kubernetes secr...

PT-2026-43368

Name of the Vulnerable Software and Affected Versions IBM HTTP Server version 8.5 IBM HTTP Server version 9.0 Description Remote code execution and denial of service are possible in configurations that utilize TLS mutual authentication, also known as client authentication, which is a process wher...

Unity Linux 20.1070e Security Update: strongswan (UTSA-2026-016762)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-016762 advisory. In strongSwan before 5.9.5, a malicious responder can send an EAP-Success message too early without actually authenticating the client and in the case of EAP methods...

curl: curl GnuTLS backend accepts a clientAuth-only certificate for HTTPS server authentication

Summary: When curl/libcurl is built with the GnuTLS backend, the current HTTPS server-certificate validation path verifies the trust chain and hostname but does not enforce TLS server Extended Key Usage semantics. As a result, a leaf certificate that chains to a trusted CA, matches the requested...

OSEC-2026-06 TLS-client (with TLS 1.3) does insufficient certificate checks (missing KeyUsage and ExtendedKeyUsage validation)

The ocaml-TLS 1.3 client does not validate the KeyUsage and ExtendedKeyUsage extensions of the server certificate. This can lead to impersonation with a certificate issued to a client. Scenario Every employee at a major bank carries a smart card. The card holds a clientAuth certificate issued by...

OSEC-2026-07 TLS-server does insufficient client certificate checks (missing KeyUsage and ExtendedKeyUsage validation)

The TLS server implementation does not validate the KeyUsage and ExtendedKeyUsage extensions of client certificates when mutually authenticated TLS is requested. This can lead to impersonation with a certificate issued to a server. Scenario An operations engineer enables mTLS on the admin endpoin...

PT-2026-42202

Name of the Vulnerable Software and Affected Versions OCaml-TLS versions prior to 2.1.0 Description The client implementation in OCaml-TLS fails to properly validate the KeyUsage and ExtendedKeyUsage EKU extensions of server certificates during TLS 1.3 handshakes. Specifically, the answer...

Astra Linux – Vulnerability in Erlang

In Erlang/OTP versions prior to 23.3.4.15, 24.x before 24.3.4.2, and 25.x before 25.0.2, there was a situation where Client Authentication Bypass occurred in certain client-certification scenarios for SSL, TLS, and DTLS...

Astra Linux - Vulnerability in Golang-1.19

Large handshake records can cause panics in the crypto/TLS context. Both clients and servers may send large TLS handshake records, which can cause both servers and clients to panic when attempting to construct responses. This issue affects all TLS 1.3 clients, TLS 1.2 clients that explicitly enab...

Improper Certificate Validation

Caddy is vulnerable to Improper Certificate Validation. The vulnerability is due to swallowed errors in ClientAuthentication.provision, where failures loading trustedcacertfile or trustedcacertspemfiles are ignored, causing mTLS authentication to fail open and accept any client certificate signed...

EUVD-2026-26413

CVE-2026-33446 is a buffer overflow in the authentication sub-system of the Secure Access client prior to 14.50. Attackers with control of a modified server can send a special packet that can overwrite a small portion of memory conceivably leading to memory corruption or a denial of service...