CWE-295
Improper Certificate Validation
The product does not validate, or incorrectly validates, a certificate.
CVE-2026-32253 (GCVE-0-2026-32253)
Vulnerability from cvelistv5 – Published: 2026-05-22 17:07 – Updated: 2026-05-26 13:08
VLAI
Title
Sunshine: Authentication bypass via improper client certificate validation
Summary
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 X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY, X509_V_ERR_CERT_NOT_YET_VALID, and X509_V_ERR_CERT_HAS_EXPIRED as success. This can allow an untrusted certificate to pass authentication and access protected HTTPS endpoints. This issue has been fixed in version 2026.516.143833.
Severity
9.8 (Critical)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/LizardByte/Sunshine/security/a… | x_refsource_CONFIRM |
| https://github.com/LizardByte/Sunshine/releases/t… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| LizardByte | Sunshine |
Affected:
< 2026.516.143833
|
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CVE-2026-32293 (GCVE-0-2026-32293)
Vulnerability from cvelistv5 – Published: 2026-03-17 17:19 – Updated: 2026-03-23 19:34
VLAI
Title
GL-iNet Comet (GL-RM1) KVM insufficient certificate validation
Summary
The GL-iNet Comet (GL-RM1) KVM connects to a GL-iNet site during boot-up to provision client and CA certificates. The GL-RM1 does not verify certificates used for this connection, allowing an attacker-in-the-middle to serve invalid client and CA certificates. The GL-RM1 will attempt to use the invalid certificates and fail to connect to the legitimate GL-iNet KVM cloud service.
Severity
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
Date Public
2026-03-17 00:00
Credits
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CVE-2026-32627 (GCVE-0-2026-32627)
Vulnerability from cvelistv5 – Published: 2026-03-13 20:48 – Updated: 2026-03-16 15:41
VLAI
Title
cpp-httplib has a Silent TLS Certificate Verification Bypass on HTTPS Redirect via Proxy
Summary
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.37.2, when a cpp-httplib client is configured with a proxy and set_follow_location(true), any HTTPS redirect it follows will have TLS certificate and hostname verification silently disabled on the new connection. The client will accept any certificate presented by the redirect target — expired, self-signed, or forged — without raising an error or notifying the application. A network attacker in a position to return a redirect response can fully intercept the follow-up HTTPS connection, including any credentials or session tokens in flight. This vulnerability is fixed in 0.37.2.
Severity
8.7 (High)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/yhirose/cpp-httplib/security/a… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| yhirose | cpp-httplib |
Affected:
< 0.37.2
|
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CVE-2026-32794 (GCVE-0-2026-32794)
Vulnerability from cvelistv5 – Published: 2026-03-30 21:43 – Updated: 2026-03-31 13:31
VLAI
Title
Apache Airflow Provider for Databricks: TLS Certificate Verification Disabled in Databricks Provider K8s Token Exchange
Summary
Improper Certificate Validation vulnerability in Apache Airflow Provider for Databricks. Provider code did not validate certificates for connections to Databricks back-end which could result in a man-of-a-middle attack that traffic is intercepted and manipulated or credentials exfiltrated w/o notice.
This issue affects Apache Airflow Provider for Databricks: from 1.10.0 before 1.12.0.
Users are recommended to upgrade to version 1.12.0, which fixes the issue.
Severity
No CVSS data available.
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/apache/airflow/pull/63704 | patch |
| https://lists.apache.org/thread/hn17yqsgsdtl81llv… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Airflow Provider for Databricks |
Affected:
1.10.0 , < 1.12.0
(semver)
|
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CVE-2026-32884 (GCVE-0-2026-32884)
Vulnerability from cvelistv5 – Published: 2026-03-30 20:36 – Updated: 2026-03-31 18:53
VLAI
Title
Botan: Case-Insensitive CN Values Bypass DNS excludedSubtrees Name Constraints (RFC 5280 Violation)
Summary
Botan is a C++ cryptography library. Prior to version 3.11.0, during processing of an X.509 certificate path using name constraints which restrict the set of allowable DNS names, if no subject alternative name is defined in the end-entity certificate Botan would check that the CN was allowed by the DNS name constraints, even though this check is technically not required by RFC 5280. However this check failed to account for the possibility of a mixed-case CN. Thus a certificate with CN=Sub.EVIL.COM and no subject alternative name would bypasses an excludedSubtrees constraint for evil.com because the comparison is case-sensitive. This issue has been patched in version 3.11.0.
Severity
5.9 (Medium)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/randombit/botan/security/advis… | x_refsource_CONFIRM |
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CVE-2026-32992 (GCVE-0-2026-32992)
Vulnerability from cvelistv5 – Published: 2026-05-13 22:06 – Updated: 2026-05-14 13:13
VLAI
Summary
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.
Severity
8.2 (High)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| WebPros | cPanel |
Affected:
11.136.0.0 , < 11.136.0.10
(semver)
Affected: 11.134.0.0 , < 11.134.0.26 (semver) Affected: 11.132.0.0 , < 11.132.0.32 (semver) Affected: 11.130.0.0 , < 11.130.0.23 (semver) Affected: 11.126.0.0 , < 11.126.0.59 (semver) |
|
| WebPros | WP Squared |
Affected:
11.126.1.0 , < 11.136.1.12
(semver)
|
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CVE-2026-33248 (GCVE-0-2026-33248)
Vulnerability from cvelistv5 – Published: 2026-03-25 20:18 – Updated: 2026-03-26 19:52
VLAI
Title
NATS has mTLS verify_and_map authentication bypass via incorrect Subject DN matching
Summary
NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, when using mTLS for client identity, with `verify_and_map` to derive a NATS identity from the client certificate's Subject DN, certain patterns of RDN would not be correctly enforced, allowing for authentication bypass. This does require a valid certificate from a CA already trusted for client certificates, and `DN` naming patterns which the NATS maintainers consider highly unlikely. So this is an unlikely attack. Nonetheless, administrators who have been very sophisticated in their `DN` construction patterns might conceivably be impacted. Versions 2.11.15 and 2.12.6 contain a fix. As a workaround, developers should review their CA issuing practices.
Severity
4.2 (Medium)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/nats-io/nats-server/security/a… | x_refsource_CONFIRM |
| https://advisories.nats.io/CVE/secnote-2026-13.txt | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| nats-io | nats-server |
Affected:
< 2.11.15
Affected: >= 2.12.0-RC.1, < 2.12.6 |
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CVE-2026-33308 (GCVE-0-2026-33308)
Vulnerability from cvelistv5 – Published: 2026-03-24 01:36 – Updated: 2026-03-24 13:34
VLAI
Title
mod_gnutls missing key purpose check in client certificate verification
Summary
Mod_gnutls is a TLS module for Apache HTTPD based on GnuTLS. Prior to version 0.13.0, code for client certificate verification did not check the key purpose as set in the Extended Key Usage extension. An attacker with access to the private key for a valid certificate issued by a CA trusted for TLS client authentication but designated for a different purpose could have used that certificate to improperly access resources requiring TLS client authentication. Server configurations that do not use client certificates (`GnuTLSClientVerify ignore`, the default) are not affected. The problem has been fixed in version 0.13.0 by rewriting certificate verification to use `gnutls_certificate_verify_peers()`, and requiring key purpose id-kp-clientAuth (also known as `tls_www_client` in GnuTLS) by default if the Extended Key Usage extension is present. The new `GnuTLSClientKeyPurpose` option allows overriding the expected key purpose if needed (please see the manual for details). Behavior for certificates without an Extended Key Usage extension is unchanged. If dedicated (sub-)CAs are used for issuing TLS client certificates only (not for any other purposes) the issue has no practical impact.
Severity
6.8 (Medium)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/airtower-luna/mod_gnutls/secur… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| airtower-luna | mod_gnutls |
Affected:
< 0.13.0
|
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CVE-2026-3336 (GCVE-0-2026-3336)
Vulnerability from cvelistv5 – Published: 2026-03-02 21:15 – Updated: 2026-03-03 20:05
VLAI
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
CWE
- CWE-295 - (Improper Certificate Validation)
Assigner
References
3 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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CVE-2026-33542 (GCVE-0-2026-33542)
Vulnerability from cvelistv5 – Published: 2026-03-26 22:32 – Updated: 2026-03-30 11:47
VLAI
Title
Incus does not verify combined fingerprint when downloading images from simplestreams servers
Summary
Incus is a system container and virtual machine manager. Prior to version 6.23.0, a lack of validation of the image fingerprint when downloading from simplestreams image servers opens the door to image cache poisoning and under very narrow circumstances exposes other tenants to running attacker controlled images rather than the expected one. Version 6.23.0 patches the issue.
Severity
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/lxc/incus/security/advisories/… | x_refsource_CONFIRM |
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Mitigation
Phases: Architecture and Design, Implementation
Description:
- Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
Mitigation
Phase: Implementation
Description:
- 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.