Common Weakness Enumeration

CWE-295

Allowed

Improper Certificate Validation

Abstraction: Base · Status: Draft

API response cwe.mitre.org

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

2039 vulnerabilities reference this CWE, most recent first.

CVE-2026-7821 (GCVE-0-2026-7821)

Vulnerability from cvelistv5 – Published: 2026-05-07 15:26 – Updated: 2026-05-07 16:15
VLAI
Summary
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 appliance and impacting on the integrity of the newly enrolled device identity.
Severity
7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-07 16:15 UTC
CWE
  • CWE-295 - Improper certificate validation
Assigner
References
Impacted products
Vendor Product Version
Ivanti Endpoint Manager Mobile Unaffected: 12.6.1.1
Unaffected: 12.7.0.1
Unaffected: 12.8.0.1
Create a notification for this product.
Show details on NVD website
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CVE-2026-7532 (GCVE-0-2026-7532)

Vulnerability from cvelistv5 – Published: 2026-06-25 21:31 – Updated: 2026-07-01 16:47
VLAI
Title
iPAddress name constraints not enforced when WOLFSSL_IP_ALT_NAME is undefined
Summary
iPAddress name constraints bypass when WOLFSSL_IP_ALT_NAME is not defined. IP address name constraints are not enforced in that configuration, allowing a certificate to bypass an issuing CA's IP address constraints.
Severity
5.7 (Medium)
CVSS:4.0/AV:A/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 10:36 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
Vendor Product Version
wolfSSL wolfSSL Affected: 0 , ≤ 5.9.1 (semver)
Create a notification for this product.
Credits
Ankur Tyagi of Cisco Talos (TALOS-2026-2409)
Show details on NVD website
To clipboard 

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CVE-2026-6900 (GCVE-0-2026-6900)

Vulnerability from cvelistv5 – Published: 2026-07-06 09:53 – Updated: 2026-07-06 18:49
VLAI
Title
Improper Certificate Validation
Summary
Improper certificate validation vulnerability in B&R Industrial Automation GmbH APROL. This issue affects APROL: before R 4.4-01P5.
Severity
7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
9.1 (Critical)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 18:49 UTC
CWE
  • CWE-295 - Improper certificate validation
Assigner
References
Impacted products
Vendor Product Version
B&R Industrial Automation GmbH APROL Affected: 0 , < R 4.4-01P5 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-6731 (GCVE-0-2026-6731)

Vulnerability from cvelistv5 – Published: 2026-06-25 20:08 – Updated: 2026-06-26 13:16
VLAI
Title
X.509 name constraint bypass via Subject CN treated as a DNS name
Summary
X.509 name constraint bypass via the Subject Common Name when treated as a DNS-type name. A certificate whose Subject CN violates an issuing CA's DNS name constraints could be accepted.
Severity
6 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 13:14 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
Vendor Product Version
wolfSSL wolfSSL Affected: 3.9.10 , ≤ 5.9.1 (semver)
Create a notification for this product.
Credits
d0sf3t (Aradex)
Show details on NVD website
To clipboard 

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CVE-2026-6450 (GCVE-0-2026-6450)

Vulnerability from cvelistv5 – Published: 2026-06-25 20:18 – Updated: 2026-06-26 13:11
VLAI
Title
CRL critical extension bypass in ParseCRL_Extensions
Summary
A CRL critical extension bypass exists in ParseCRL_Extensions where critical extensions are not properly enforced, allowing a crafted CRL with an unhandled critical extension to be accepted. This only affects builds with CRL support enabled and where a crafted CRL had a trusted signature when parsed.
Severity
1 (Low)
CVSS:4.0/AV:A/AC:H/AT:P/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 13:11 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
Vendor Product Version
wolfSSL wolfSSL Affected: 4.3.0 , ≤ 5.9.1 (semver)
Create a notification for this product.
Credits
Oleh Konko (@1seal)
Show details on NVD website
To clipboard 

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CVE-2026-6091 (GCVE-0-2026-6091)

Vulnerability from cvelistv5 – Published: 2026-06-25 16:46 – Updated: 2026-06-25 17:58
VLAI
Title
Partial-chain verification accepts untrusted intermediate as trust anchor
Summary
Partial-chain certificate verification may accept chains that terminate at a peer-supplied, untrusted intermediate certificate rather than a trusted anchor. An attacker could present a chain that ends at an intermediate they control and have it accepted as valid. This affects the OpenSSL compatibility certificate-path-building path (wolfSSL_X509_verify_cert / X509_STORE, OPENSSL_EXTRA) when the X509_V_FLAG_PARTIAL_CHAIN verify flag is enabled.
Severity
6 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 17:58 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
Vendor Product Version
wolfSSL wolfSSL Affected: 5.7.4 , ≤ 5.9.1 (semver)
Create a notification for this product.
Credits
Dikai Zou
Show details on NVD website
To clipboard 

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CVE-2026-5787 (GCVE-0-2026-5787)

Vulnerability from cvelistv5 – Published: 2026-05-07 15:36 – Updated: 2026-05-08 03:55
VLAI
Summary
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.
Severity
8.9 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-07 00:00 UTC
CWE
  • CWE-295 - Improper certificate validation
Assigner
References
Impacted products
Vendor Product Version
Ivanti Endpoint Manager Mobile Unaffected: 12.8.0.1 (custom)
Unaffected: 12.7.0.1 (custom)
Unaffected: 12.6.1.1 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-5501 (GCVE-0-2026-5501)

Vulnerability from cvelistv5 – Published: 2026-04-10 03:07 – Updated: 2026-04-22 13:59
VLAI
Title
Improper Certificate Signature Verification in X.509 Chain Validation Allows Forged Leaf Certificates
Summary
wolfSSL_X509_verify_cert in the OpenSSL compatibility layer accepts a certificate chain in which the leaf's signature is not checked, if the attacker supplies an untrusted intermediate with Basic Constraints `CA:FALSE` that is legitimately signed by a trusted root. An attacker who obtains any leaf certificate from a trusted CA (e.g. a free DV cert from Let's Encrypt) can forge a certificate for any subject name with any public key and arbitrary signature bytes, and the function returns `WOLFSSL_SUCCESS` / `X509_V_OK`. The native wolfSSL TLS handshake path (`ProcessPeerCerts`) is not susceptible and the issue is limited to applications using the OpenSSL compatibility API directly, which would include integrations of wolfSSL into nginx and haproxy.
Severity
8.6 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-22 03:55 UTC
CWE
  • CWE-295 - Improper certificate validation
Assigner
References
Impacted products
Vendor Product Version
wolfSSL wolfSSL Affected: 0 , ≤ 5.9.0 (semver)
Create a notification for this product.
Credits
Calif.io in collaboration with Claude and Anthropic Research
Show details on NVD website
To clipboard 

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CVE-2026-5263 (GCVE-0-2026-5263)

Vulnerability from cvelistv5 – Published: 2026-04-09 21:15 – Updated: 2026-07-02 14:45
VLAI
Title
URI nameConstraints not enforced in ConfirmNameConstraints()
Summary
URI nameConstraints from constrained intermediate CAs are parsed but not enforced during certificate chain verification in wolfcrypt/src/asn.c. A compromised or malicious sub-CA could issue leaf certificates with URI SAN entries that violate the nameConstraints of the issuing CA, and wolfSSL would accept them as valid.
Severity
7 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:L/VA:N/SC:H/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-10 18:08 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
Vendor Product Version
wolfSSL wolfSSL Affected: 0 , < 5.9.1 (semver)
Create a notification for this product.
Credits
Oleh Konko @1seal
Show details on NVD website
To clipboard 

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CVE-2026-5194 (GCVE-0-2026-5194)

Vulnerability from cvelistv5 – Published: 2026-04-09 19:30 – Updated: 2026-05-23 22:06
VLAI
Title
wolfSSL ECDSA Certificate Verification
Summary
Missing hash/digest size and OID checks allow digests smaller than allowed when verifying ECDSA certificates, or smaller than is appropriate for the relevant key type, to be accepted by signature verification functions. This could lead to reduced security of ECDSA certificate-based authentication if the public CA key used is also known. This affects ECDSA/ECC verification when EdDSA or ML-DSA is also enabled.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:L/SA:L/U:Red
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-21 00:00 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
Vendor Product Version
wolfSSL wolfSSL Affected: 3.12.0 , < 5.9.1 (semver)
Create a notification for this product.
Credits
Nicholas Carlini from Anthropic
Show details on NVD website
To clipboard 

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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.

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