CWE-295
AllowedImproper Certificate Validation
Abstraction: Base · Status: Draft
The product does not validate, or incorrectly validates, a certificate.
2267 vulnerabilities reference this CWE, most recent first.
GHSA-2X53-82M9-JCGF
Vulnerability from github – Published: 2026-07-14 18:32 – Updated: 2026-07-14 18:32Improper certificate validation in Windows Active Directory allows an authorized attacker to elevate privileges locally.
{
"affected": [],
"aliases": [
"CVE-2026-55001"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-14T17:17:07Z",
"severity": "HIGH"
},
"details": "Improper certificate validation in Windows Active Directory allows an authorized attacker to elevate privileges locally.",
"id": "GHSA-2x53-82m9-jcgf",
"modified": "2026-07-14T18:32:09Z",
"published": "2026-07-14T18:32:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55001"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55001"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-2X8H-GGXV-WW4J
Vulnerability from github – Published: 2026-02-05 18:30 – Updated: 2026-02-12 18:30An Improper Certificate Validation vulnerability in TP-Link Tapo H100 v1 and Tapo P100 v1 allows an on-path attacker on the same network segment to intercept and modify encrypted device-cloud communications. This may compromise the confidentiality and integrity of device-to-cloud communication, enabling manipulation of device data or operations.
{
"affected": [],
"aliases": [
"CVE-2025-15557"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-05T18:16:09Z",
"severity": "HIGH"
},
"details": "An Improper Certificate Validation vulnerability in TP-Link Tapo H100 v1 and Tapo P100 v1 allows an on-path attacker on the same network segment to intercept and modify encrypted device-cloud communications.\u00a0 This may compromise the confidentiality and integrity of device-to-cloud communication, enabling manipulation of device data or operations.",
"id": "GHSA-2x8h-ggxv-ww4j",
"modified": "2026-02-12T18:30:20Z",
"published": "2026-02-05T18:30:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-15557"
},
{
"type": "WEB",
"url": "https://www.tp-link.com/en/support/download/tapo-h100"
},
{
"type": "WEB",
"url": "https://www.tp-link.com/en/support/download/tapo-p100"
},
{
"type": "WEB",
"url": "https://www.tp-link.com/us/support/download/tapo-h100"
},
{
"type": "WEB",
"url": "https://www.tp-link.com/us/support/download/tapo-p100"
},
{
"type": "WEB",
"url": "https://www.tp-link.com/us/support/faq/4949"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-2XGV-7Q8P-67GC
Vulnerability from github – Published: 2026-09-06 18:34 – Updated: 2026-09-08 21:33When CURLOPT_PINNEDPUBLICKEY is configured alongside options that disable
standard peer verification (CURLOPT_SSL_VERIFYPEER = 0 and
CURLOPT_SSL_VERIFYHOST = 0), libcurl fails to enforce public key pinning on
connections established without a presented server certificate. Bypassing the
pinning check under these disabled-verification conditions allows
unauthenticated connections to succeed when they should be rejected.
{
"affected": [],
"aliases": [
"CVE-2026-80230"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-06T18:17:22Z",
"severity": "HIGH"
},
"details": "When `CURLOPT_PINNEDPUBLICKEY` is configured alongside options that disable\nstandard peer verification (`CURLOPT_SSL_VERIFYPEER = 0` and\n`CURLOPT_SSL_VERIFYHOST = 0`), libcurl fails to enforce public key pinning on\nconnections established without a presented server certificate. Bypassing the\npinning check under these disabled-verification conditions allows\nunauthenticated connections to succeed when they should be rejected.",
"id": "GHSA-2xgv-7q8p-67gc",
"modified": "2026-09-08T21:33:02Z",
"published": "2026-09-06T18:34:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80230"
},
{
"type": "WEB",
"url": "https://hackerone.com/reports/3969300"
},
{
"type": "WEB",
"url": "https://curl.se/docs/CVE-2026-80230.html"
},
{
"type": "WEB",
"url": "https://curl.se/docs/CVE-2026-80230.json"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-2XVR-QGR6-H5F7
Vulnerability from github – Published: 2022-05-13 01:39 – Updated: 2022-05-13 01:39The Shein Group Ltd. "SHEIN - Fashion Shopping" app -- aka shein fashion-shopping/id878577184 -- for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.
{
"affected": [],
"aliases": [
"CVE-2017-14710"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-07-12T16:29:00Z",
"severity": "MODERATE"
},
"details": "The Shein Group Ltd. \"SHEIN - Fashion Shopping\" app -- aka shein fashion-shopping/id878577184 -- for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.",
"id": "GHSA-2xvr-qgr6-h5f7",
"modified": "2022-05-13T01:39:42Z",
"published": "2022-05-13T01:39:42Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-14710"
},
{
"type": "WEB",
"url": "https://www.crissyfield.de/blog/2017/12/14/missing-certificate-validation"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-2XXP-9232-MWJ8
Vulnerability from github – Published: 2022-05-17 19:57 – Updated: 2024-04-03 23:59duplicity 0.6.24 has improper verification of SSL certificates
{
"affected": [],
"aliases": [
"CVE-2014-3495"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-12-13T14:15:00Z",
"severity": "HIGH"
},
"details": "duplicity 0.6.24 has improper verification of SSL certificates",
"id": "GHSA-2xxp-9232-mwj8",
"modified": "2024-04-03T23:59:42Z",
"published": "2022-05-17T19:57:07Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2014-3495"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/cve-2014-3495"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2014-3495"
},
{
"type": "WEB",
"url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2014-3495"
},
{
"type": "WEB",
"url": "https://security-tracker.debian.org/tracker/CVE-2014-3495"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-3224-P867-265F
Vulnerability from github – Published: 2026-02-25 06:31 – Updated: 2026-02-26 18:31Improper Certificate Validation vulnerability in ASUSTOR ADM FTP Backup on Linux, x86, ARM, 64 bit allows Sniffing Attacks.This issue affects ADM: from 4.1.0 through 4.3.3.ROF1, from 5.0.0 through 5.1.2.RE51.
{
"affected": [],
"aliases": [
"CVE-2026-3100"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-25T06:16:26Z",
"severity": "HIGH"
},
"details": "Improper Certificate Validation vulnerability in ASUSTOR ADM FTP Backup on Linux, x86, ARM, 64 bit allows Sniffing Attacks.This issue affects ADM: from 4.1.0 through 4.3.3.ROF1, from 5.0.0 through 5.1.2.RE51.",
"id": "GHSA-3224-p867-265f",
"modified": "2026-02-26T18:31:38Z",
"published": "2026-02-25T06:31:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3100"
},
{
"type": "WEB",
"url": "https://www.asustor.com/security/security_advisory_detail?id=53"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-3248-8MH4-PCMR
Vulnerability from github – Published: 2026-10-02 09:31 – Updated: 2026-10-02 09:31Improper certificate validation in PkixNameConstraintValidator (ExtractHostFromURL) in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a name-constrained subordinate CA, or anyone able to obtain certificates with chosen subjectAltName URIs from such a CA, to bypass permitted or excluded uniformResourceIdentifier name constraints during certification path validation via a URI whose path, query, fragment or userinfo contains characters such as '@' or ':', because the host was extracted by string slicing without first isolating the RFC 3986 authority component, so the host compared against the constraints could differ from the URI's actual host.
{
"affected": [],
"aliases": [
"CVE-2026-63576"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-02T08:17:02Z",
"severity": "HIGH"
},
"details": "Improper certificate validation in PkixNameConstraintValidator (ExtractHostFromURL) in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a name-constrained subordinate CA, or anyone able to obtain certificates with chosen subjectAltName URIs from such a CA, to bypass permitted or excluded uniformResourceIdentifier name constraints during certification path validation via a URI whose path, query, fragment or userinfo contains characters such as \u0027@\u0027 or \u0027:\u0027, because the host was extracted by string slicing without first isolating the RFC 3986 authority component, so the host compared against the constraints could differ from the URI\u0027s actual host.",
"id": "GHSA-3248-8mh4-pcmr",
"modified": "2026-10-02T09:31:20Z",
"published": "2026-10-02T09:31:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63576"
},
{
"type": "WEB",
"url": "https://github.com/bcgit/bc-csharp/commit/f196a22bbf7765cc19b0c4f4645c74ea7ad35e09"
},
{
"type": "WEB",
"url": "https://github.com/bcgit/bc-csharp/wiki/CVE-2026-63576"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-32C4-PXR5-P8GV
Vulnerability from github – Published: 2025-07-08 18:31 – Updated: 2025-07-08 18:31Improper certificate validation in Windows SMB allows an authorized attacker to perform spoofing over a network.
{
"affected": [],
"aliases": [
"CVE-2025-48802"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-08T17:15:43Z",
"severity": "MODERATE"
},
"details": "Improper certificate validation in Windows SMB allows an authorized attacker to perform spoofing over a network.",
"id": "GHSA-32c4-pxr5-p8gv",
"modified": "2025-07-08T18:31:45Z",
"published": "2025-07-08T18:31:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-48802"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-48802"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-32R6-GFFX-PJ25
Vulnerability from github – Published: 2026-03-04 15:30 – Updated: 2026-03-04 15:30The server certificate was not verified when an Arc agent connected to a Guardian or CMC.
A malicious actor could perform a man-in-the-middle attack and intercept the communication between the Arc agent and the Guardian or CMC. This could result in theft of the client token and sensitive information (such as assets and alerts), impersonation of the server, or injection of spoofed data (such as false asset information or vulnerabilities) into the Guardian or CMC.
{
"affected": [],
"aliases": [
"CVE-2025-40896"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-04T14:16:14Z",
"severity": "MODERATE"
},
"details": "The server certificate was not verified when an Arc agent connected to a Guardian or CMC.\n\n\n\nA malicious actor could perform a man-in-the-middle attack and intercept the communication between the Arc agent and the Guardian or CMC. This could result in theft of the client token and sensitive information (such as assets and alerts), impersonation of the server, or injection of spoofed data (such as false asset information or vulnerabilities) into the Guardian or CMC.",
"id": "GHSA-32r6-gffx-pj25",
"modified": "2026-03-04T15:30:35Z",
"published": "2026-03-04T15:30:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40896"
},
{
"type": "WEB",
"url": "https://security.nozominetworks.com/NN-2025:18-01"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-32XH-3X3C-6G6H
Vulnerability from github – Published: 2026-07-03 09:31 – Updated: 2026-07-06 18:30A vulnerability exists where a new transfer that uses STARTTLS to upgrade the connection might reuse an existing live connection even though the TLS configuration mismatches so it should not.
{
"affected": [],
"aliases": [
"CVE-2026-8286"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-03T07:16:24Z",
"severity": "HIGH"
},
"details": "A vulnerability exists where a new transfer that uses STARTTLS to upgrade the\nconnection might reuse an existing live connection even though the TLS\nconfiguration mismatches so it should not.",
"id": "GHSA-32xh-3x3c-6g6h",
"modified": "2026-07-06T18:30:47Z",
"published": "2026-07-03T09:31:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8286"
},
{
"type": "WEB",
"url": "https://hackerone.com/reports/3718195"
},
{
"type": "WEB",
"url": "https://curl.se/docs/CVE-2026-8286.html"
},
{
"type": "WEB",
"url": "https://curl.se/docs/CVE-2026-8286.json"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
]
}
Mitigation
Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
Mitigation
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.