Common Weakness Enumeration

CWE-295

Allowed

Improper Certificate Validation

Abstraction: Base · Status: Draft

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

2327 vulnerabilities reference this CWE, most recent first.

CVE-2026-85087 (GCVE-0-2026-85087)

Vulnerability from cvelistv5 – Published: 2026-10-02 11:35 – Updated: 2026-10-02 17:42
VLAI
Title
Apache Thrift: Python ≥3.12 host-name check silently becomes a no-op
Summary
Improper certificate validation, Return of wrong status code vulnerability in Apache Thrift python bindings. This issue affects Apache Thrift: before 0.25.0. Users are recommended to upgrade to version 0.25.0, which fixes the issue.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-02 17:41 UTC
CWE
  • CWE-295 - Improper certificate validation
  • CWE-393 - Return of wrong status code
Assigner
apache CNA under the mitre root
CNA scorecard B 76/100 over 1010 records in the last 180 days details
Impacted products
Vendor Product Version
Apache Software Foundation Apache Thrift Affected: 0 , < 0.25.0 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-85086 (GCVE-0-2026-85086)

Vulnerability from cvelistv5 – Published: 2026-10-02 11:34 – Updated: 2026-10-02 17:42
VLAI
Title
Apache Thrift: Perl TLS client disables certificate verification by default
Summary
Improper certificate validation, Initialization of a resource with an insecure default vulnerability in Apache Thrift perl bindings. This issue affects Apache Thrift: before 0.25.0. Users are recommended to upgrade to version 0.25.0, which fixes the issue.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-02 17:42 UTC
CWE
  • CWE-295 - Improper certificate validation
  • CWE-1188 - Initialization of a resource with an insecure default
Assigner
apache CNA under the mitre root
CNA scorecard B 76/100 over 1010 records in the last 180 days details
Impacted products
Vendor Product Version
Apache Software Foundation Apache Thrift Affected: 0 , < 0.25.0 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-84975 (GCVE-0-2026-84975)

Vulnerability from cvelistv5 – Published: 2026-09-18 17:08 – Updated: 2026-09-24 21:05
VLAI
Title
PJSIP: TLS server identity (hostname) verification bypass via embedded NUL in certificate SubjectAltName (OpenSSL and GnuTLS backends)
Summary
PJSIP is a free and open source multimedia communication library written in C. In 2.17 and earlier, the OpenSSL and GnuTLS backends in pjlib/src/pj/ssl_sock_ossl.c and pjlib/src/pj/ssl_sock_gtls.c copy DNS SubjectAltName values with string functions that recalculate their length and truncate an embedded NUL byte. With server verification enabled through --tls-verify-server for the PJSIP TLS/SIPS transport, a certificate containing a DNS SubjectAltName formed from the target hostname prefix followed by an embedded NUL and an attacker-controlled suffix can therefore be accepted for the prefix hostname. An attacker who possesses such a certificate from a trusted issuer and can intercept the connection can impersonate the target server, complete the SIP session, and receive REGISTER credentials. The mbedTLS backend is not affected because it preserves the explicit string length. No fixed version is available as of this review.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-24 21:00 UTC
CWE
  • CWE-295 - Improper Certificate Validation
  • CWE-297 - Improper Validation of Certificate with Host Mismatch
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7613 records in the last 180 days details
References
Impacted products
Vendor Product Version
pjsip pjproject Affected: <= 2.17
Create a notification for this product.
Show details on NVD website

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CVE-2026-84961 (GCVE-0-2026-84961)

Vulnerability from cvelistv5 – Published: 2026-09-04 16:47 – Updated: 2026-09-04 18:37
VLAI
Title
undici vulnerable to TLS certificate validation bypass via dropped connect options in BalancedPool
Summary
undici's BalancedPool constructor passes its entire options object through an internal deep-clone that serializes and reparses the value as JSON. Because JSON cannot represent functions, any function-valued TLS option, such as a caller-supplied checkServerIdentity callback or a custom connector inside the connect option, is silently discarded before it reaches the TLS layer. As a result a peer whose certificate the application's custom checkServerIdentity was written to reject, but which still passes Node's default hostname and chain checks, is accepted when reached through BalancedPool. The Client, Pool, and Agent dispatchers are not affected because they extract the connect and tls options before cloning. This affects undici versions from 7.24.1 up to 7.29.1 and from 8.0.0 up to 8.10.2, and only when the application supplies a function-valued connect or tls option to BalancedPool. Users should upgrade to undici 7.29.1 or 8.10.2.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-04 18:35 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
openjs CNA under the redhat root
CNA scorecard C 65/100 over 114 records in the last 180 days details
Impacted products
Vendor Product Version
undici undici Affected: 7.24.1 , < 7.29.1 (semver)
Unaffected: 7.29.1 (semver)
Affected: 8.0.0 , < 8.10.2 (semver)
Unaffected: 8.10.2 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-84850 (GCVE-0-2026-84850)

Vulnerability from cvelistv5 – Published: 2026-09-15 19:11 – Updated: 2026-09-20 00:38
VLAI
Summary
Improper certificate validation in the shared HTTP client used by synchronization and integration features in Devolutions Server 2026.2.16 and earlier allows a network-positioned attacker to intercept and tamper with outbound TLS connections via a spoofed or self-signed certificate.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-20 00:38 UTC
CWE
  • CWE-295 - Improper certificate validation
Assigner
DEVOLUTIONS CNA under the mitre root
CNA scorecard E 44/100 over 64 records in the last 180 days details
Impacted products
Vendor Product Version
Devolutions Server Affected: 0 , ≤ 2026.2.16 (custom)
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CVE-2026-84736 (GCVE-0-2026-84736)

Vulnerability from cvelistv5 – Published: 2026-09-03 16:10 – Updated: 2026-09-03 17:38
VLAI
Summary
In the current development version of Eclipse aeriOS, for which no official release has yet been published, the Federator component disables TLS certificate validation for outbound HTTPS connections by default. When the TLS_CERTIFICATE_VALIDATION environment variable is unset or set to false, the component configures its HTTP transport to skip TLS certificate verification. As a result, an attacker able to intercept network communications between the Federator and external services could impersonate those services and intercept sensitive information transmitted over HTTPS, including OAuth client credentials and bearer tokens. The issue has been addressed by enabling TLS certificate validation by default. The TLS_CERTIFICATE_VALIDATION environment variable is now set to true in the default configuration provided by the Helm chart and Docker Compose deployment.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-03 17:38 UTC
CWE
  • CWE-295 - Improper certificate validation
Assigner
eclipse CNA under the mitre root
CNA scorecard C 63/100 over 150 records in the last 180 days details
Impacted products
Vendor Product Version
Eclipse Foundation Eclipse aeriOS Affected: d730017a4a0e2a31feba6258bd780efbce7e0d5d , < 9c63b60becc9873b0195ff9cd6582b69cb12d4f2 (git)
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Show details on NVD website

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CVE-2026-84465 (GCVE-0-2026-84465)

Vulnerability from cvelistv5 – Published: 2026-09-25 18:19 – Updated: 2026-09-29 18:08
VLAI
Title
Zammad: S/MIME signature verification allows forged sender impersonation
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when Zammad checks the digital signature on an incoming S/MIME-signed email, it does not verify that the signing certificate is genuinely trusted, it only checks whether a certificate with a matching name is already stored in the system. An attacker can create their own certificate using the name of a real, previously trusted sender and use it to send a forged email. Zammad will display that email with the same "validly signed" indicator as a genuine message from the real sender, even though the attacker never had access to that sender's actual certificate or private key. This issue is fixed in version 7.1.2.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 18:07 UTC
CWE
  • CWE-290 - Authentication Bypass by Spoofing
  • CWE-295 - Improper Certificate Validation
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7613 records in the last 180 days details
References
Impacted products
Vendor Product Version
zammad zammad Affected: < 7.1.2
Create a notification for this product.
Show details on NVD website

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CVE-2026-84418 (GCVE-0-2026-84418)

Vulnerability from cvelistv5 – Published: 2026-10-12 22:25 – Updated: 2026-10-12 22:53
VLAI
Title
DataStage on Cloud Pak for Data Improper Certificate Validation
Summary
IBM DataStage on Cloud Pak for Data 5.4.0.0 can allow a man-in-the-middle attacker to present a forged TLS certificate, intercept the connection, and capture the IAM bearer Authorization header automatically attached by the session adapter. The captured token grants full platform-scope tenant API access, enabling the attacker to read and manipulate the victim's DataStage projects, flows, assets, and pipeline definitions. This is client-side SDK code running on the user's own machine, so exploitation requires an external network interceptor rather than a co-tenant in the shared cluster.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-12 22:44 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
ibm CNA under the mitre root
CNA scorecard B 88/100 over 1278 records in the last 180 days details
References
URL Tags
https://www.ibm.com/support/pages/node/7288649 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM DataStage on Cloud Pak for Data Affected: 5.4.0.0
    cpe:2.3:a:ibm:datastage_on_cloud_pak_for_data:5.4.0.0:*:*:*:*:*:*:*
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CVE-2026-84197 (GCVE-0-2026-84197)

Vulnerability from cvelistv5 – Published: 2026-09-08 20:01 – Updated: 2026-09-09 20:51
VLAI
Summary
In Eclipse Ditto's Node.js JavaScript client, all released versions of @eclipse-ditto/ditto-javascript-client-node from 2.0.0 to 3.9.0 and of its predecessor package @eclipse-ditto/ditto-javascript-client-node_1.0 from 1.0.0 to 2.1.0, the WebSocket transport hard-codes rejectUnauthorized: false when creating the underlying ws WebSocket. Certificate chain and hostname validation are therefore disabled for every wss:// connection, and no builder option, constructor argument or environment variable lets an application turn validation back on. An attacker in a position to intercept the connection can present an arbitrary certificate, complete the TLS handshake, read the credentials that the configured authentication provider sends in the Authorization header of the WebSocket upgrade request, and read, alter or inject Ditto Protocol messages for the lifetime of the connection. The Java client, the browser/DOM JavaScript client and the HTTP transport of the Node.js client are not affected.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 20:40 UTC
CWE
  • CWE-295 - Improper certificate validation
  • CWE-297 - Improper validation of certificate with host mismatch
  • CWE-300 - Channel Accessible by Non-Endpoint
Assigner
eclipse CNA under the mitre root
CNA scorecard C 63/100 over 150 records in the last 180 days details
Impacted products
Vendor Product Version
Eclipse Foundation Eclipse Ditto Affected: 2.0.0 , < 3.8.1 (semver)
Affected: 3.9.0 , < 3.9.1 (semver)
Create a notification for this product.
Eclipse Foundation Eclipse Ditto Affected: 1.0.0 , ≤ 2.1.0 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-84081 (GCVE-0-2026-84081)

Vulnerability from cvelistv5 – Published: 2026-09-18 19:48 – Updated: 2026-09-23 03:55
VLAI
Title
IBM Guardium Data Protection is affected by multiple vulnerabilities.
Summary
IBM Guardium Data Protection 12.2 could allow a remote attacker to bypass security restrictions due to improper certificate validation.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 00:00 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
ibm CNA under the mitre root
CNA scorecard B 88/100 over 1278 records in the last 180 days details
References
URL Tags
https://www.ibm.com/support/pages/node/7288035 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM Guardium Data Protection Affected: 12.2
    cpe:2.3:a:ibm:guardium_data_protection:12.2:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:guardium_data_protection:12.2.0:*:*:*:*:*:*:*
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.