Improper Certificate Validation
CWE-295
The product does not validate, or incorrectly validates, a certificate.
We track 520 vulnerabilities of this type. 100% are rated high or critical, and the average CVSS score is 8.2. 6 have been exploited in real attacks.
How this weakness is prevented
- Architecture and Design Implementation: Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
- Implementation: If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.
Latest Improper Certificate Validation vulnerabilities
- 7.5 High severity
wolfSSL: Improper Certificate Validation
X.509 trust-chain bypass in the OpenSSL compatibility certificate verifier (wolfSSL_X509_verify_cert()). This affects only builds with --enable-opensslextra (OPENSSL_EXTRA) and whose application validates certificates by calling X509_verify_cert() with caller-
- 7.5 High severity
wolfSSL: Improper Certificate Validation
X.509 trust-chain bypass (path-depth exhaustion) in the OpenSSL compatibility certificate verifier (wolfSSL_X509_verify_cert()). This affects only builds with --enable-opensslextra whose application calls X509_verify_cert() with caller-supplied untrusted inter
- 7.8 High severity
Display and Peripheral Manager: Improper Certificate Validation
Dell Display and Peripheral Manager (DDPM Mac), versions prior to 2.3, contain an Improper Certificate Validation vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Protection mechanism bypass.
- 8.3 High severity
Red Hat OpenShift for Windows Containers 10.19: Improper Certificate Validation
A flaw was found in the Windows Machine Config Operator (WMCO) for Red Hat OpenShift Container Platform. WMCO establishes SSH connections to Windows worker nodes without verifying the remote server host key. An adjacent-network attacker who can intercept or re
- 7.4 High severity
undici: Improper Certificate Validation
Impact: undici's ProxyAgent silently drops the requestTls option when configured with a SOCKS5 proxy URI (socks5:// or socks://). The target HTTPS connection through the SOCKS5 tunnel falls back to Node's default trust store, ignoring user-configured ca, cert,
- 8.6 High severity
Harvester: Improper Certificate Validation
An attacker with network-level access between the SUSE Virtualization and Rancher Manager in SUSE Harvester before 1.8.0 could interfere with the TLS handshake and abuse it to bypass TLS as a security control.
- 8.8 High severity
Vendor PAM: Improper Certificate Validation
Idira Vendor PAM - Self-Hosted Connector versions prior 1.1.100504 under specific conditions and configuration scenarios, TLS certificate validation may not be fully enforced. CyberArk Security Bulletin: CA26-17
- 7.8 High severity
Idira Endpoint Privilege Manager: Improper Certificate Validation
Idira Endpoint Privilege Manager Agent versions prior to 26.5 exhibit improper access control within internal agent validation processes. A local attacker could potentially bypass built-in security controls or cryptographic validations. Under specific circumst
- 7.4 High severity
Assisted Migration Agent: Improper Certificate Validation
A flaw was found in assisted-migration-agent. The application hardcodes insecure Transport Layer Security (TLS) connections when communicating with vCenter. This vulnerability allows a Man-in-the-Middle (MITM) attacker to intercept and harvest vCenter administ
- 7.4 High severity
Quantum Security Gateway: Improper Certificate Validation
A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an unauthenticated attacker positioned as a man-in-the-middle to bypass certificate validation in VPN site-to-site connections that use certificate-based authenticati
- 8.0 High severity
Termix: Improper Certificate Validation
Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. Starting in version 1.7.0, Termix Desktop (Electron) disables TLS certificate validation, allowing a machine-in-the-middle attacker to intercept and m
- 7.4 High severity
Red Hat OpenStack Platform 16.2: Improper Validation of Certificate with Host Mismatch
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 ssl_ca_file is configured, the driver enables certificate chain
- 7.8 High severity
BOSH: Improper Certificate Validation
A network man-in-the-middle between nats-sync and the BOSH director can steal the director credentials (Basic auth header or UAA client secret) and can tamper with the VM list that is written into the NATS authorization file. Stolen credentials grant administr
- 8.7 High severity
ex_aws_sns: Improper Certificate Validation
Improper Certificate Validation vulnerability in ex-aws ex_aws_sns (ExAws.SNS, ExAws.SNS.PublicKeyCache modules) allows Signature Spoofing by Improper Validation. This vulnerability is associated with program files lib/ex_aws/sns.ex, lib/ex_aws/sns/public_key_
- 8.1 High severity
OTP: Improper Certificate Validation
Improper Certificate Validation vulnerability in Erlang OTP public_key (pubkey_cert and public_key modules) allows a DNS nameConstraints bypass via subject CommonName fallback in TLS hostname verification. Two flaws combine to allow a subordinate CA whose DNS
- 8.1 High severity
epa4all-client: Improper Certificate Validation
epa4all-client is the Java Client for epa4all / ePA 3.0 in the Telematik Infrastruktur. Prior to 1.2.2, an attacker on the network path between the ePA service and the Konnektor can present any TLS certificate (self-signed, expired, wrong CN) and intercept all
- 8.1 High severity
epa4all-client: Improper Certificate Validation
epa4all-client is the Java Client for epa4all / ePA 3.0 in the Telematik Infrastruktur. Prior to 1.2.1, in SignedPublicKeysTrustValidatorImpl.isTrusted(), the ECDSA signature verification at line 45 discards the boolean return value of Signature.verify(). The
- 8.2 High severity
Red Hat Enterprise Linux 10: Improper Certificate Validation
A flaw was found in gnutls. When validating certificates, an oversized Subject Alternative Name (SAN) could cause the validation process to incorrectly fall back to checking the Common Name (CN) field. This could allow a remote attacker to bypass proper certif
- 7.1 High severity
Red Hat Enterprise Linux 10: Improper Certificate Validation
A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate val
- 7.4 High severity
Fastnetmon: Improper Certificate Validation
FastNetMon Community Edition through 1.2.9 does not verify TLS certificates on outbound HTTPS connections. The execute_web_request_secure() function in src/fast_library.cpp creates a boost::asio::ssl::context with tls_client mode and calls set_default_verify_p
- 9.3 Critical severity
Szafir SDK: Improper Certificate Validation
For untrusted certificates that contain the "Authority Information Access - caIssuers URI" extension, Szafir SDK will automatically download the parent CA certificate from the specified URL and will import it to its trust store as a "nonqualified" certificate.
- 9.8 Critical severity
Sunshine: Improper Authentication
Sunshine is a self-hosted game stream host for Moonlight. In versions prior to 2026.516.143833, the client-certificate authentication can be bypassed because of how OpenSSL verification results are handled. In src/crypto.cpp, the custom verify callback treats
- 8.8 High severity
Secure Access Client: Improper Certificate Validation
An improper certificate validation vulnerability in Ivanti Secure Access Client before 22.8R6 allows a remote unauthenticated attacker to execute arbitrary code.
- 7.4 High severity
golang.org/x/crypto/ssh/knownhosts: Improper Certificate Validation
Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation. Now, both the 'key' and 'key.SignatureKey' are checked for @revoked.
- 7.5 High severity
golang.org/x/crypto/ssh: Improper Certificate Validation
SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChecker now returns an error instead of panicking when these callbacks are nil.
- 8.8 High severity
golang.org/x/crypto/ssh: Improper Certificate Validation
When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certificate restrictions such as force-command after a second factor succeeded. Returning non-nil
- 8.7 High severity
ex_webrtc: Improper Certificate Validation
Elixir WebRTC is an Elixir implementation of the W3C WebRTC API. Prior to 0.15.1 and 0.16.1, missing DTLS peer certificate fingerprint validation in the DTLS client (active) role removes one side of WebRTC's mutual authentication. The bug is not independently
- 7.5 High severity
fleet: Improper Certificate Validation
Fleet is open source device management software. Prior to version 4.81.0, a vulnerability in Fleet’s Windows MDM management endpoint could allow requests to be processed without proper client certificate validation. In certain circumstances, this could allow a
- 8.2 High severity
cPanel: Improper Certificate Validation
SSL verification is disabled in the DNS Cluster system. This could allow for a malicious server to man-in-the-middle the request and capture credentials.
- 7.4 High severity
ckan: Improper Certificate Validation
CKAN is an open-source DMS (data management system) for powering data hubs and data portals. Prior to 2.10.10 and 2.11.5, the configured SMTP server may be spoofed with any certificate (e.g. self-signed), leaving credentials and all emails sent open to MITM at
- 8.1 High severity
Prisma SD-WAN ION: Improper Certificate Validation
An improper certificate validation vulnerability in the Palo Alto Networks Prisma SD-WAN ION enables man-in-the-middle (MitM) attacker to impersonate the controller.
- 9.1 Critical severity
"Kura Sushi Official App" for Android: Improper Certificate Validation
"Kura Sushi Official App" provided by EPG, Inc. is vulnerable to improper certificate validation. A man-in-the-middle attack may allow eavesdropping on, or altering, the communication on push notifications between the affected application and the relevant serv
- 9.1 Critical severity
Endpoint Manager Mobile: Improper Certificate Validation
Improper certificate validation in Ivanti EPMM before versions 12.6.1.1, 12.7.0.1, and 12.8.0.1 allows a remote unauthenticated attacker to enroll a device belonging to a restricted set of unenrolled devices, leading to information disclosure about EPMM applia
- 9.1 Critical severity
Endpoint Manager Mobile: Improper Certificate Validation
An Improper Certificate Validation in Ivanti EPMM before versions 12.6.1.1, 12.7.0.1, and 12.8.0.1 allows a remote unauthenticated attacker to impersonate registered Sentry hosts and obtain valid CA-signed client certificates.
- 7.4 High severity
Red Hat Enterprise Linux 10: Improper Certificate Validation
A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name const
- 7.3 High severity
Apache Thrift: Improper Validation of Certificate with Host Mismatch
Improper Validation of Certificate with Host Mismatch vulnerability in Apache Thrift. This issue affects Apache Thrift: before 0.23.0. Users are recommended to upgrade to version 0.23.0, which fixes the issue.
- 9.8 Critical severity
Spring Boot: Improper Certificate Validation
Spring Boot's Cassandra auto-configuration does not perform hostname verification when establishing an SSL connection to Cassandra. Affected: Spring Boot 4.0.0–4.0.5 (fix 4.0.6), 3.5.0–3.5.13 (fix 3.5.14), 3.4.0–3.4.15 (fix 3.4.16), 3.3.0–3.3.18 (fix 3.3.19),
- 9.1 Critical severity
Spring Boot: Improper Certificate Validation
When configured to use an SSL bundle, Spring Boot's RabbitMQ auto-configuration does not perform hostname verification when connecting to the RabbitMQ broker. Affected: Spring Boot 4.0.0–4.0.5 (fix 4.0.6), 3.5.0–3.5.13 (fix 3.5.14) per vendor advisory.
- 8.1 High severity
Spring Security: Improper Validation of Certificate with Host Mismatch
Vulnerability in Spring Spring Security. SubjectX500PrincipalExtractor does not correctly handle certain malformed X.509 certificate CN values, which can lead to reading the wrong value for the username. In a carefully crafted certificate, this can lead to an
- 8.8 High severity
PowerProtect Data Domain: Improper Certificate Validation
Dell PowerProtect Data Domain with Data Domain Operating System (DD OS) of Feature Release versions 7.7.1.0 through 8.5, LTS2025 release version 8.3.1.0 through 8.3.1.20, LTS2024 release versions 7.13.1.0 through 7.13.1.60, contain(s) an Improper Certificate V