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, ...

UBUNTU-CVE-2026-13067

When PROXY protocol v2 is used on the Unix domain socket path, roles derived from X.509 client certificates may not be validated against the configured tlsCATrusts allow-list. This can result in unintended role assignments following MONGODB-X509 authentication. Affected scenarios require local...

EUVD-2026-47794

When PROXY protocol v2 is used on the Unix domain socket path, roles derived from X.509 client certificates may not be validated against the configured tlsCATrusts allow-list. This can result in unintended role assignments following MONGODB-X509 authentication. Affected scenarios require local...

CVE-2026-13070

A MongoDB server initiating an outbound TLS connection may terminate abnormally when processing a malformed OCSP response from a remote peer during the TLS handshake. OCSP stapling validation is enabled by default for outgoing TLS connections. Affected scenarios require the remote peer to hold a...

CVE-2026-13070

The CVE affects MongoDB servers performing outbound TLS connections. A malformed OCSP response during the TLS handshake can cause the server to terminate abnormally, due to OCSP stapling validation enabled by default for outgoing connections. Impact is primarily availability (possible process ter...

PT-2026-63474

A MongoDB server initiating an outbound TLS connection may terminate abnormally when processing a malformed OCSP response from a remote peer during the TLS handshake. OCSP stapling validation is enabled by default for outgoing TLS connections. Affected scenarios require the remote peer to hold a...

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...

CVE-2026-33248

A flaw was found in NATS-Server, a high-performance messaging system. When configured to use mutual Transport Layer Security mTLS for client identity, and specifically the verifyandmap feature, certain patterns within a client certificate's Subject Distinguished Name DN were not correctly enforce...

CVE-2026-33248

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, when using mTLS for client identity, with verifyandmap to derive a NATS identity from the client certificate's Subject DN, certain patterns of RDN would not be...

CVE-2026-33248 NATS has mTLS verify_and_map authentication bypass via incorrect Subject DN matching

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, when using mTLS for client identity, with verifyandmap to derive a NATS identity from the client certificate's Subject DN, certain patterns of RDN would not be...

CVE-2026-33248

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, when using mTLS for client identity, with verifyandmap to derive a NATS identity from the client certificate's Subject DN, certain patterns of RDN would not be...

Blocklist Bypass possible via ECDSA Signature Malleability

Impact When using P256 certificates which is not the default configuration, it is possible to evade a blocklist entry created against the fingerprint of a certificate by using ECDSA Signature Malleability to use a copy of the certificate with a different fingerprint. In order for this to affect a...

Improper Verification of Cryptographic Signature

Overview Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature due to use of P256 certificates. An attacker can evade blocklist enforcement by exploiting ECDSA signature malleability to generate a certificate with a different fingerprint, allowing us...

GHSA-69X3-G4R3-P962 Blocklist Bypass possible via ECDSA Signature Malleability

Impact When using P256 certificates which is not the default configuration, it is possible to evade a blocklist entry created against the fingerprint of a certificate by using ECDSA Signature Malleability to use a copy of the certificate with a different fingerprint. In order for this to affect a...

Improper Authentication

Elasticsearch is vulnerable to Improper Authentication. The vulnerability is due to insufficient validation of client certificates in the PKI realm, which allows an attacker with a specially crafted certificate signed by a trusted CA to impersonate other users...

CVE-2025-37731

A flaw was found in Elasticsearch. This vulnerability allows user impersonation via specially crafted client certificates signed by a legitimate, trusted Certificate Authority CA. Mitigation To reduce the risk of exploitation, ensure that the Certificate Authority CA used for the Elasticsearch PK...

Improper Certificate Validation

Overview org.elasticsearch.plugin:x-pack-security is an Elasticsearch Expanded Pack Plugin - Security Affected versions of this package are vulnerable to Improper Certificate Validation via the PKI realm. An attacker can impersonate other users by presenting specially crafted client certificates...

Improper Certificate Validation

Overview Affected versions of this package are vulnerable to Improper Certificate Validation via the PKI realm. An attacker can impersonate other users by presenting specially crafted client certificates signed by a trusted Certificate Authority. Note: This is only exploitable if the attacker...

UBUNTU-CVE-2025-37731

Improper Authentication in Elasticsearch PKI realm can lead to user impersonation via specially crafted client certificates. A malicious actor would need to have such a crafted client certificate signed by a legitimate, trusted Certificate Authority...

EUVD-2025-203360

Improper Authentication in Elasticsearch PKI realm can lead to user impersonation via specially crafted client certificates. A malicious actor would need to have such a crafted client certificate signed by a legitimate, trusted Certificate Authority...