Common Weakness Enumeration
CWE-295
AllowedImproper Certificate Validation
Abstraction: Base · Status: Draft
The product does not validate, or incorrectly validates, a certificate.
1905 vulnerabilities reference this CWE, most recent first.
CVE-2026-5501 (GCVE-0-2026-5501)
Vulnerability from cvelistv5 – Published: 2026-04-10 03:07 – Updated: 2026-04-22 13:59
VLAI
EPSS
VEX
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Improper certificate validation
Assigner
References
1 reference
Credits
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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
EPSS
VEX
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
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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
EPSS
VEX
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
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
2 references
Impacted products
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CVE-2026-4740 (GCVE-0-2026-4740)
Vulnerability from cvelistv5 – Published: 2026-04-07 14:30 – Updated: 2026-07-15 00:48
VLAI
EPSS
VEX
Title
Rhacm: open cluster management (ocm): cross-cluster privilege escalation via improper kubernetes client certificate renewal validation
Summary
A flaw was found in Open Cluster Management (OCM), the technology underlying Red Hat Advanced Cluster Management (ACM). Improper validation of Kubernetes client certificate renewal allows a managed cluster administrator to forge a client certificate that can be approved by the OCM controller. This enables cross-cluster privilege escalation and may allow an attacker to gain control over other managed clusters, including the hub cluster.
Severity
8.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-4740 | vdb-entryx_refsource_REDHAT |
| https://blog.arfevrier.fr/open-cluster-management… | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2450590 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Multicluster Engine for Kubernetes |
cpe:/a:redhat:multicluster_engine |
Date Public
2026-04-07 14:00
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CVE-2026-4587 (GCVE-0-2026-4587)
Vulnerability from cvelistv5 – Published: 2026-03-23 12:46 – Updated: 2026-03-23 13:46
VLAI
EPSS
VEX
Title
HybridAuth SSL Curl.php certificate validation
Summary
A vulnerability was found in HybridAuth up to 3.12.2. This issue affects some unknown processing of the file src/HttpClient/Curl.php of the component SSL Handler. The manipulation of the argument curlOptions results in improper certificate validation. The attack can be launched remotely. This attack is characterized by high complexity. The exploitability is assessed as difficult. The project was informed of the problem early through an issue report but has not responded yet.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.352423 | vdb-entrytechnical-description |
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| https://vuldb.com/?submit.775463 | third-party-advisory |
| https://github.com/hybridauth/hybridauth/issues/1444 | issue-tracking |
| https://github.com/hybridauth/hybridauth/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | HybridAuth |
Affected:
3.12.0
Affected: 3.12.1 Affected: 3.12.2 |
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CVE-2026-4434 (GCVE-0-2026-4434)
Vulnerability from cvelistv5 – Published: 2026-03-20 12:52 – Updated: 2026-03-23 14:12
VLAI
EPSS
VEX
Summary
Improper certificate validation in the PAM propagation WinRM connections
allows a network attacker to perform a man-in-the-middle attack via
disabled TLS certificate verification.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Improper certificate validation
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Devolutions | Server |
Affected:
0 , < 2026.1
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CVE-2026-4396 (GCVE-0-2026-4396)
Vulnerability from cvelistv5 – Published: 2026-03-18 19:41 – Updated: 2026-03-18 20:10
VLAI
EPSS
VEX
Summary
Improper certificate validation in Devolutions Hub Reporting Service
2025.3.1.1 and earlier allows a network attacker to perform a
man-in-the-middle attack via disabled TLS certificate verification.
Severity
8.3 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Improper certificate validation
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Devolutions | Hub Reporting Service |
Affected:
0 , ≤ 2025.3.1.1
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CVE-2026-4370 (GCVE-0-2026-4370)
Vulnerability from cvelistv5 – Published: 2026-04-01 08:09 – Updated: 2026-04-08 07:27
VLAI
EPSS
VEX
Title
Improper TLS Client/Server authentication and certificate verification on Database Cluster
Summary
A vulnerability was identified in Juju from version 3.2.0 until 3.6.19 and from version 4.0 until 4.0.4, where the internal Dqlite database cluster fails to perform proper TLS client and server authentication. Specifically, the Juju controller's database endpoint does not validate client certificates when a new node attempts to join the cluster. An unauthenticated attacker with network reachability to the Juju controller's Dqlite port can exploit this flaw to join the database cluster. Once joined, the attacker gains full read and write access to the underlying database, allowing for total data compromise.
Severity
10 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
Impacted products
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CVE-2026-3822 (GCVE-0-2026-3822)
Vulnerability from cvelistv5 – Published: 2026-03-09 03:38 – Updated: 2026-03-11 06:49
VLAI
EPSS
VEX
Title
Taipower｜Taipower APP(Android) - Improper Certificate Validation
Summary
Taipower APP for Andorid developed by Taipower has an Improper Certificate Validation vulnerability. When establishing an HTTPS connection with the server, the application fails to verify the server-side TLS/SSL certificate. This flaw allows an unauthenticated remote attackers to exploit the vulnerability to perform a Man-in-the-Middle (MITM) attack to read and tamper with network packets.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Improper certificate validation
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.twcert.org.tw/tw/cp-132-10750-3735f-1.html | third-party-advisory |
| https://www.twcert.org.tw/en/cp-139-10751-23871-2.html | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Taipower | Taipower APP |
Affected:
0 , ≤ 3.4.4
(custom)
|
Date Public
2026-03-09 03:29
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CVE-2026-3336 (GCVE-0-2026-3336)
Vulnerability from cvelistv5 – Published: 2026-03-02 21:15 – Updated: 2026-07-15 01:06
VLAI
EPSS
VEX
Title
PKCS7_verify Certificate Chain Validation Bypass in AWS-LC
Summary
Improper certificate validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass certificate chain verification when processing PKCS7 objects with multiple signers, except the final signer.
Customers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/aws/aws-lc/releases/tag/v1.69.0 | patch |
| https://github.com/aws/aws-lc/security/advisories… | third-party-advisory |
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| https://access.redhat.com/errata/RHSA-2026:5459 | vendor-advisoryx_refsource_REDHAT |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| AWS | AWS-LC |
Affected:
1.41.0 , < 1.69.0
(custom)
|
|
| Red Hat | Red Hat Trusted Artifact Signer 1.3 |
Unaffected:
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|
| Red Hat | Confidential Compute Attestation |
cpe:/a:redhat:confidential_compute_attestation:1 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4 |
|
| Red Hat | Red Hat OpenShift Update Service |
cpe:/a:redhat:openshift_update_service:5 |
|
| Red Hat | Red Hat Trusted Profile Analyzer |
cpe:/a:redhat:trusted_profile_analyzer:2 |
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"value": "Improper certificate validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass certificate chain verification when processing PKCS7 objects with multiple signers, except the final signer.\n\nCustomers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0."
}
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"providerMetadata": {
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"orgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5",
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"references": [
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"tags": [
"vendor-advisory"
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"url": "https://aws.amazon.com/security/security-bulletins/2026-005-AWS/"
},
{
"tags": [
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"url": "https://github.com/aws/aws-lc/releases/tag/v1.69.0"
},
{
"tags": [
"third-party-advisory"
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"url": "https://github.com/aws/aws-lc/security/advisories/GHSA-cfwj-9wp5-wqvp"
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"source": {
"discovery": "UNKNOWN"
},
"title": "PKCS7_verify Certificate Chain Validation Bypass in AWS-LC",
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"datePublished": "2026-03-02T21:15:16.709Z",
"dateReserved": "2026-02-27T15:16:27.359Z",
"dateUpdated": "2026-07-15T01:06:35.858Z",
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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.