Common Weakness Enumeration

CWE-295

Allowed

Improper Certificate Validation

Abstraction: Base · Status: Draft

The product does not validate, or incorrectly validates, a certificate.

2039 vulnerabilities reference this CWE, most recent first.

CVE-2026-82662 (GCVE-0-2026-82662)

Vulnerability from cvelistv5 – Published: 2026-08-31 08:46 – Updated: 2026-08-31 08:46
VLAI
Title
Nodemailer before 8.0.8 TLS Certificate Validation Bypass
Summary
Nodemailer before 8.0.8 disables TLS certificate verification in lib/fetch/index.js through rejectUnauthorized: false, allowing attackers to intercept OAuth2 token requests. Attackers in a machine-in-the-middle position can capture OAuth client secrets, refresh tokens, and access tokens transmitted over compromised HTTPS connections.
CWE
  • CWE-295 - Improper Certificate Validation
References
Impacted products
Vendor Product Version
nodemailer nodemailer Affected: 0 , < 8.0.8 (semver)
Unaffected: 8.0.8 (semver)
    cpe:2.3:a:nodemailer:nodemailer:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-05-26 00:00
Show details on NVD website

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CVE-2026-81518 (GCVE-0-2026-81518)

Vulnerability from cvelistv5 – Published: 2026-08-28 20:18 – Updated: 2026-08-31 18:38
VLAI
Title
BI Connector Optional Client Certificate Verification Allows Unauthenticated Connections
Summary
When mongosqld is configured with a client certificate authority file, the listener requests a client certificate during the TLS handshake but does not require one, so a client that presents no certificate is still accepted. In deployments that rely on client certificates as the sole means of identifying users, a remote party with network access to the listener can therefore establish a session and read the MongoDB data exposed through the connector.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 18:37 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Impacted products
Vendor Product Version
MongoDB BI Connector Affected: 0 , < 2.14.31 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-81034 (GCVE-0-2026-81034)

Vulnerability from cvelistv5 – Published: 2026-08-26 15:45 – Updated: 2026-08-26 18:31
VLAI
Title
Netmaker through 1.6.0 Improper Certificate Validation in SMTP Client
Summary
Netmaker disables certificate verification on the connection to the configured mail server. The sender in pro/email/smtp.go assigns a TLS configuration whose skip-verify field is set to true unconditionally, directly beneath a comment stating that the setting should be false in production. No configuration value governs it and no code path restores verification, so the client accepts any certificate the mail server presents, including one an interposing party supplies. Mail that Netmaker sends over that connection includes password-reset messages carrying single-use tokens and user invitations carrying enrolment links, so a party positioned on the path between the server and its mail relay can read those messages in transit and use a captured reset token before the intended recipient does. The setting is absent from the development branch but present in the latest release.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 18:30 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Impacted products
Vendor Product Version
gravitl netmaker Affected: 0 , ≤ 1.6.0 (semver)
    cpe:2.3:a:netmaker:netmaker:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-26 00:00
Show details on NVD website

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CVE-2026-79785 (GCVE-0-2026-79785)

Vulnerability from cvelistv5 – Published: 2026-08-25 16:03 – Updated: 2026-08-29 11:48
VLAI
Title
X-AnyLabeling before 4.0.0-beta.9 Improper Certificate Validation in Model Downloads
Summary
X-AnyLabeling's model downloader disabled TLS certificate verification. download_with_retry in anylabeling/services/auto_labeling/model.py built a context with ssl._create_unverified_context() and passed it to urllib.request.urlopen, so neither the certificate chain nor the hostname was checked on any model download, and models are fetched over HTTPS from the project's release host. Any party positioned to intercept that connection could therefore answer it with content of their own choosing. The response is written to a .part file and moved into place with os.replace, and the only post-download check, safe_check_model, validates the file's format rather than its provenance: no hash or signature is compared against an expected value. For an ONNX target the substituted file passes onnx.checker.check_model and is then used for inference, so the attacker chooses the model that produces the application's annotations. For a .pth or .pt target, which the shipped SAM2 video, YOLOE, UPN and open_vision configurations use, the check worker calls torch.load without weights_only, so a substituted file is unpickled and executes code of the attacker's choosing on PyTorch releases predating the weights_only default.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 19:01 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Impacted products
Vendor Product Version
CVHub520 X-AnyLabeling Affected: 0 , < 4.0.0-beta.9 (semver)
Create a notification for this product.
CVHub520 X-AnyLabeling Affected: 0 , < 4.0.0b9 (python)
Create a notification for this product.
Date Public
2026-06-16 00:00
Credits
Show details on NVD website

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CVE-2026-78323 (GCVE-0-2026-78323)

Vulnerability from cvelistv5 – Published: 2026-08-24 11:11 – Updated: 2026-08-24 11:50
VLAI
Title
Jss: jss: jsstrustmanager does not verify nss trust flags on ca certificates
Summary
A flaw was found in JSS (Java Security Services). The JSSTrustManager class does not verify NSS trust flags when validating CA certificates, allowing certificates present in the NSS database without TRUSTED_CA flags to be accepted as trust anchors for TLS connections. In non-default configurations where certificate revocation checking is disabled, this could allow a man-in-the-middle attacker to forge certificates accepted by PKI client connections.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-24 11:50 UTC
CWE
  • CWE-295 - Improper Certificate Validation
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-78323 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2521775 issue-trackingx_refsource_REDHAT
Impacted products
Date Public
2026-08-24 09:07
Show details on NVD website

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CVE-2026-76403 (GCVE-0-2026-76403)

Vulnerability from cvelistv5 – Published: 2026-08-19 21:35 – Updated: 2026-08-20 15:26
VLAI
Title
Improper Certificate Validation through HTTP Event Collector Kerberos Authentication in Splunk Connect for Kafka
Summary
In Splunk Connect for Kafka versions below 2.2.7, an unauthenticated user positioned in the network path could read or alter all relevant data sent from the connector when Kerberos authentication is used with Hypertext Transfer Protocol (HTTP) Event Collector in Splunk Enterprise. The vulnerability is possible because the Kerberos authentication path does not apply the configured certificate validation options when it builds the HTTP client. For more information see Install Splunk Connect for Kafka (https://help.splunk.com/en/data-management/integrate-data-with-add-ons/splunk-connect-for-kafka/2.2/install/install-splunk-connect-for-kafka), Security configurations for Splunk Connect for Kafka (https://help.splunk.com/en/splunk-enterprise/get-data-in/splunk-connect-for-kafka/2.2/configure/security-configurations-for-splunk-connect-for-kafka), and Set up and use HTTP Event Collector with configuration files (https://help.splunk.com/en/splunk-enterprise/get-data-in/get-started-with-getting-data-in/9.4/get-data-with-http-event-collector/set-up-and-use-http-event-collector-with-configuration-files) in the Splunk documentation.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:09 UTC
CWE
  • CWE-295 - The software does not validate, or incorrectly validates, a certificate.
Impacted products
Vendor Product Version
Splunk Splunk Connect for Kafka Affected: 2.2 , < 2.2.7 (custom)
Create a notification for this product.
Date Public
2026-08-19 00:00
Show details on NVD website

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CVE-2026-76362 (GCVE-0-2026-76362)

Vulnerability from cvelistv5 – Published: 2026-08-19 21:34 – Updated: 2026-08-21 03:56
VLAI
Title
Improper Certificate Validation through CyberArk Vault Privileged Access Manager in Splunk SOAR
Summary
In Splunk SOAR versions below 8.6.0, an unauthenticated user who can observe or alter network traffic between Splunk SOAR and a configured CyberArk Representational State Transfer (REST) server could access or modify all relevant data exchanged through that credential manager. The vulnerability is possible because the CyberArk REST client does not verify server certificates by default. The attack requires the attacker to have network-path interception capability between Splunk SOAR and the configured CyberArk REST server. For more information see Manage your organization's credentials with a password vault (https://help.splunk.com/en/splunk-soar/soar-cloud/administer-soar-cloud/configure-administration-settings-in-splunk-soar-cloud/manage-your-organizations-credentials-with-a-password-vault) in the Splunk documentation.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 00:00 UTC
CWE
  • CWE-295 - The software does not validate, or incorrectly validates, a certificate.
Impacted products
Vendor Product Version
Splunk Splunk SOAR Affected: 8.6 , < 8.6.0 (custom)
Create a notification for this product.
Date Public
2026-08-19 00:00
Show details on NVD website

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CVE-2026-76242 (GCVE-0-2026-76242)

Vulnerability from cvelistv5 – Published: 2026-08-19 14:02 – Updated: 2026-08-20 15:38
VLAI
Title
stigmem Federation Peer Registration Authentication Bypass
Summary
stigmem-node 0.9.0a1 accepts federation peer key material during peer registration without a separate administrator out-of-band fingerprint approval step. On nodes that accept federation peer registration over a network where initial registration can be intercepted or misdirected, an attacker can register a malicious peer and gain access to or tamper with federation traffic. Fixed in 0.9.0a2, which introduces a pending approval flow requiring administrator fingerprint verification before peer tokens are accepted.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:37 UTC
CWE
  • CWE-295 - Improper Certificate Validation
References
Impacted products
Vendor Product Version
eidetic-labs stigmem Affected: 0 , < 0.9.0a2 (custom)
Unaffected: 0.9.0a2 (custom)
Create a notification for this product.
Date Public
2026-05-19 00:00
Show details on NVD website

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CVE-2026-74774 (GCVE-0-2026-74774)

Vulnerability from cvelistv5 – Published: 2026-08-26 19:05 – Updated: 2026-08-27 14:42
VLAI
Summary
Dell PowerProtect One, versions 20.1.0.0 and below, contain an Improper Certificate Validation vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to Protection mechanism bypass.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 14:41 UTC
CWE
  • CWE-295 - Improper Certificate Validation
References
Impacted products
Vendor Product Version
Dell PowerProtect One Affected: 0 , < 20.3.0.0 (semver)
Create a notification for this product.
Date Public
2026-08-23 18:30
Show details on NVD website

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CVE-2026-73253 (GCVE-0-2026-73253)

Vulnerability from cvelistv5 – Published: 2026-08-20 17:41 – Updated: 2026-08-20 18:36
VLAI
Title
Mongoose: TLS Hostname Verification Bypass via Overly Permissive Wildcard Matching
Summary
Mongoose is an embedded web server and network library. Prior to version 7.22, an on-path network attacker with a wildcard certificate for a parent domain can impersonate deeper subdomains to a client using the built-in TLS stack. The mg_tls_verify_cert_san() and mg_tls_verify_cert_cn() functions in src/tls_builtin.c call mg_match(), whose wildcard can cross DNS label boundaries, so a pattern such as *.example.com can match foo.bar.example.com. The resulting hostname verification bypass permits interception and modification of TLS traffic. This issue is fixed in version 7.22.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 18:33 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Impacted products
Vendor Product Version
cesanta mongoose Affected: < 7.22
Create a notification for this product.
Show details on NVD website

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Mitigation
Architecture and Design Implementation

Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.

Mitigation
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.

CAPEC-459: Creating a Rogue Certification Authority Certificate

An adversary exploits a weakness resulting from using a hashing algorithm with weak collision resistance to generate certificate signing requests (CSR) that contain collision blocks in their "to be signed" parts. The adversary submits one CSR to be signed by a trusted certificate authority then uses the signed blob to make a second certificate appear signed by said certificate authority. Due to the hash collision, both certificates, though different, hash to the same value and so the signed blob works just as well in the second certificate. The net effect is that the adversary's second X.509 certificate, which the Certification Authority has never seen, is now signed and validated by that Certification Authority.

CAPEC-475: Signature Spoofing by Improper Validation

An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.