Common Weakness Enumeration
CWE-295
AllowedImproper Certificate Validation
Abstraction: Base · Status: Draft
The product does not validate, or incorrectly validates, a certificate.
1903 vulnerabilities reference this CWE, most recent first.
CVE-2026-59836 (GCVE-0-2026-59836)
Vulnerability from cvelistv5 – Published: 2026-07-14 15:15 – Updated: 2026-07-15 03:59
VLAI
EPSS
VEX
Summary
A improper certificate validation vulnerability in Fortinet FortiClientEMS 7.4.3 through 7.4.5, FortiClientEMS 7.4.0 through 7.4.1, FortiClientEMS 7.2 all versions may allow attacker to information disclosure via <insert attack vector here>
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Information disclosure
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Fortinet | FortiClientEMS |
Affected:
7.4.3 , ≤ 7.4.5
(semver)
Affected: 7.4.0 , ≤ 7.4.1 (semver) Affected: 7.2.12 , ≤ 7.2.14 (semver) Affected: 7.2.0 , ≤ 7.2.10 (semver) cpe:2.3:a:fortinet:forticlientems:7.4.5:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.4.4:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.4.3:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.4.1:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.4.0:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.2.14:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.2.13:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.2.12:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.2.10:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.2.9:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.2.8:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.2.7:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.2.6:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.2.5:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.2.4:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.2.3:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.2.2:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.2.1:*:*:*:*:*:*:* cpe:2.3:a:fortinet:forticlientems:7.2.0:*:*:*:*:*:*:* |
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CVE-2026-59818 (GCVE-0-2026-59818)
Vulnerability from cvelistv5 – Published: 2026-07-08 21:00 – Updated: 2026-07-09 13:13
VLAI
EPSS
VEX
Title
etcd: gRPC client listener does not enforce `--client-crl-file` certificate revocation
Summary
etcd is a distributed key-value store for the data of a distributed system. Prior to 3.5.32 and 3.6.13, when etcd is configured with --listen-client-http-urls to split HTTP and gRPC client endpoints onto separate listeners, the --client-crl-file Certificate Revocation List is not enforced on the gRPC listener, allowing a client with a revoked certificate to authenticate successfully over gRPC. This issue is fixed in versions 3.5.32 and 3.6.13.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/etcd-io/etcd/security/advisori… | x_refsource_CONFIRM |
| https://github.com/etcd-io/etcd/pull/22007 | x_refsource_MISC |
| https://github.com/etcd-io/etcd/pull/22021 | x_refsource_MISC |
| https://github.com/etcd-io/etcd/pull/22025 | x_refsource_MISC |
| https://github.com/etcd-io/etcd/commit/2308ce1578… | x_refsource_MISC |
| https://github.com/etcd-io/etcd/commit/24838af5a5… | x_refsource_MISC |
| https://github.com/etcd-io/etcd/commit/8221ae82bc… | x_refsource_MISC |
| https://github.com/etcd-io/etcd/releases/tag/v3.5.32 | x_refsource_MISC |
| https://github.com/etcd-io/etcd/releases/tag/v3.6.13 | x_refsource_MISC |
Impacted products
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CVE-2026-55964 (GCVE-0-2026-55964)
Vulnerability from cvelistv5 – Published: 2026-06-25 19:30 – Updated: 2026-06-26 13:57
VLAI
EPSS
VEX
Title
Chain intermediate CA:TRUE without keyCertSign accepted as a signing CA (temporary CA exemption)
Summary
Chain intermediate CA:TRUE without keyCertSign accepted as a signing CA. Intermediate CA certificates are required to have the keyCertSign key usage when a Key Usage extension is present, but chain-supplied temporary CAs (WOLFSSL_TEMP_CA) added while building a certificate path were previously exempted from this check, so an intermediate asserting CA:TRUE but lacking keyCertSign was accepted as a signing CA. The check now applies to chain-supplied temporary CAs as well; only operator-loaded root certificates (WOLFSSL_USER_CA) and self-signed roots remain exempt. Per RFC 5280 an absent Key Usage extension implies all usages, so the requirement is enforced only when the extension is actually present (extKeyUsageSet). Affects the OpenSSL-compatibility certificate-path-building path (X509_verify_cert / X509_STORE, OPENSSL_EXTRA/OPENSSL_ALL), where untrusted chain intermediates are added as temporary CAs; native (non-OpenSSL-compat) certificate verification does not create temporary CAs and is unaffected. Within those builds, the check applies unless ALLOW_INVALID_CERTSIGN is defined.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
2 references
Impacted products
Credits
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CVE-2026-55960 (GCVE-0-2026-55960)
Vulnerability from cvelistv5 – Published: 2026-06-25 19:31 – Updated: 2026-06-26 13:58
VLAI
EPSS
VEX
Title
Un-negotiated Raw Public Key (RFC 7250) accepted in place of X.509, bypassing chain validation
Summary
Un-negotiated Raw Public Key (RFC 7250) accepted in place of an X.509 certificate, bypassing chain validation. A raw public key has no chain, so ParseCertRelative() accepts it without performing any trust verification; it must therefore only be accepted when RPK was actually negotiated for that peer. The check now defaults the expected type to X.509 (per RFC 7250/8446) when no type was negotiated, comparing against the received server certificate type on the client and the selected client certificate type on the server, and rejects any mismatch, including an un-negotiated raw public key, with UNSUPPORTED_CERTIFICATE. Only affects builds with Raw Public Key support (HAVE_RPK) enabled - disabled by default in a standalone build, but included in --enable-all.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
2 references
Impacted products
Credits
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CVE-2026-55436 (GCVE-0-2026-55436)
Vulnerability from cvelistv5 – Published: 2026-07-08 00:26 – Updated: 2026-07-08 13:11
VLAI
EPSS
VEX
Title
Coder's AI Bridge Proxy skips TLS certificate verification in default configuration
Summary
Coder allows organizations to provision remote development environments via Terraform. Starting in version 2.30.0 and prior to versions 2.32.7, 2.33.8, and 2.34.2, the AI Bridge Proxy (`aibridgeproxyd`) created a goproxy server whose default transport set `InsecureSkipVerify: true` and only assigned a secure transport when an upstream proxy was configured. In the default configuration (no upstream proxy), outbound HTTPS to the Coder access URL accepted any TLS certificate. Practical exploitation requires an on-path (man-in-the-middle) position between the AI Bridge Proxy and the Coder server. Deployments where they are co-located over loopback are effectively unaffected. The fix in versions 2.32.7, 2.33.8, and 2.34.2 applies the secure transport (TLS 1.2 or higher using system root CAs) unconditionally. As a workaround, ensure the Coder access URL uses a trusted certificate and secure the network path between the AI Bridge Proxy and the Coder server (for example, loopback or mTLS).
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/coder/coder/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/coder/coder/pull/26131 | x_refsource_MISC |
| https://github.com/coder/coder/releases/tag/v2.32.7 | x_refsource_MISC |
| https://github.com/coder/coder/releases/tag/v2.33.8 | x_refsource_MISC |
| https://github.com/coder/coder/releases/tag/v2.34.2 | x_refsource_MISC |
Impacted products
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CVE-2026-55001 (GCVE-0-2026-55001)
Vulnerability from cvelistv5 – Published: 2026-07-14 17:04 – Updated: 2026-07-15 03:57
VLAI
EPSS
VEX
Title
Active Directory Domain Services Elevation of Privilege Vulnerability
Summary
Improper certificate validation in Windows Active Directory allows an authorized attacker to elevate privileges locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
9 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Windows 10 Version 1607 |
Affected:
10.0.14393.0 , < 10.0.14393.9339
(custom)
|
|
| Microsoft | Windows 10 Version 1809 |
Affected:
10.0.17763.0 , < 10.0.17763.9020
(custom)
|
|
| Microsoft | Windows Server 2016 |
Affected:
10.0.14393.0 , < 10.0.14393.9339
(custom)
|
|
| Microsoft | Windows Server 2016 (Server Core installation) |
Affected:
10.0.14393.0 , < 10.0.14393.9339
(custom)
|
|
| Microsoft | Windows Server 2019 |
Affected:
10.0.17763.0 , < 10.0.17763.9020
(custom)
|
|
| Microsoft | Windows Server 2019 (Server Core installation) |
Affected:
10.0.17763.0 , < 10.0.17763.9020
(custom)
|
|
| Microsoft | Windows Server 2022 |
Affected:
10.0.20348.0 , < 10.0.20348.5386
(custom)
|
|
| Microsoft | Windows Server 2025 |
Affected:
10.0.26100.0 , < 10.0.26100.33158
(custom)
|
|
| Microsoft | Windows Server 2025 (Server Core installation) |
Affected:
10.0.26100.0 , < 10.0.26100.33158
(custom)
|
Date Public
2026-07-14 14:00
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CVE-2026-54919 (GCVE-0-2026-54919)
Vulnerability from cvelistv5 – Published: 2026-07-10 16:06 – Updated: 2026-07-14 03:55
VLAI
EPSS
VEX
Title
cpp-httplib: TLS certificate chain verification bypassed for IP-literal hosts on Mbed TLS and wolfSSL backends
Summary
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. In affected Mbed TLS backend versions from 0.31.0 through 0.46.1 and wolfSSL backend versions from 0.33.0 through 0.46.1, when cpp-httplib is built with CPPHTTPLIB_MBEDTLS_SUPPORT or CPPHTTPLIB_WOLFSSL_SUPPORT and a client connects to an IP-literal host with server certificate verification enabled, SSLClient and Client in HTTPS mode skip certificate chain validation and WebSocketClient on the Mbed TLS backend skips verification altogether, allowing a man-in-the-middle attacker positioned to intercept traffic to present a crafted certificate and read or modify the traffic. This issue is fixed in version 0.47.0.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/yhirose/cpp-httplib/security/a… | x_refsource_CONFIRM |
| https://github.com/yhirose/cpp-httplib/commit/fa9… | x_refsource_MISC |
| https://github.com/yhirose/cpp-httplib/releases/t… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| yhirose | cpp-httplib |
Affected:
>= 0.31.0, < 0.47.0
|
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CVE-2026-54323 (GCVE-0-2026-54323)
Vulnerability from cvelistv5 – Published: 2026-06-23 18:06 – Updated: 2026-06-24 14:27
VLAI
EPSS
VEX
Title
Daytona: Git credential leak via git clone with TLS verification disabled
Summary
Daytona is a secure and elastic infrastructure runtime for AI-generated code execution and agent workflows. Prior to 0.185.0, the daemon's git clone implementation disabled TLS certificate verification. When a clone request carried Git credentials, the daemon sent the HTTP Basic Authorization header to the remote over a connection whose certificate was never validated, on both the go-git and native git CLI code paths. An attacker able to intercept clone traffic could present any TLS certificate, capture the Git credentials supplied for the clone, and serve tampered repository content into the sandbox. This vulnerability is fixed in 0.185.0.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/daytonaio/daytona/security/adv… | x_refsource_CONFIRM |
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CVE-2026-54100 (GCVE-0-2026-54100)
Vulnerability from cvelistv5 – Published: 2026-06-22 12:46 – Updated: 2026-07-15 00:43
VLAI
EPSS
VEX
Title
Windows-machine-config-operator: windows-machine-config-operator: ssh host key not verified enables credential theft
Summary
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Severity
8.3 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-54100 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2487953 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4 |
|
| Red Hat | Red Hat OpenShift for Windows Containers |
cpe:/a:redhat:windows_machine_config |
Date Public
2026-06-10 00:00
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CVE-2026-53475 (GCVE-0-2026-53475)
Vulnerability from cvelistv5 – Published: 2026-06-10 13:55 – Updated: 2026-06-10 14:51
VLAI
EPSS
VEX
Title
Assisted-migration-agent: tls verification disabled on all vcenter connections
Summary
A flaw was found in assisted-migration-agent. The application hardcodes insecure Transport Layer Security (TLS) connections when communicating with vCenter. This vulnerability allows a Man-in-the-Middle (MITM) attacker to intercept and harvest vCenter administrator credentials. This can lead to unauthorized access to vCenter.
Severity
9.3 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-53475 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2487232 | issue-trackingx_refsource_REDHAT |
| https://github.com/kubev2v/assisted-migration-age… |
Impacted products
Date Public
2026-06-07 00:00
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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.