CWE-295
AllowedImproper Certificate Validation
Abstraction: Base · Status: Draft
The product does not validate, or incorrectly validates, a certificate.
2186 vulnerabilities reference this CWE, most recent first.
GHSA-8RM2-MC4G-PM72
Vulnerability from github – Published: 2022-05-24 17:18 – Updated: 2026-08-19 18:31A security feature bypass vulnerability exists in Microsoft Windows when the Task Scheduler service fails to properly verify client connections over RPC, aka 'Windows Task Scheduler Security Feature Bypass Vulnerability'.
{
"affected": [],
"aliases": [
"CVE-2020-1113"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-05-21T23:15:00Z",
"severity": "HIGH"
},
"details": "A security feature bypass vulnerability exists in Microsoft Windows when the Task Scheduler service fails to properly verify client connections over RPC, aka \u0027Windows Task Scheduler Security Feature Bypass Vulnerability\u0027.",
"id": "GHSA-8rm2-mc4g-pm72",
"modified": "2026-08-19T18:31:22Z",
"published": "2022-05-24T17:18:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-1113"
},
{
"type": "WEB",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1113"
},
{
"type": "WEB",
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1113"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-8RQ8-F59M-9CJG
Vulnerability from github – Published: 2026-09-06 18:34 – Updated: 2026-09-08 21:33With the wolfSSL backend, when CA caching is enabled and an
CURLOPT_SSL_CTX_FUNCTION callback replaces the trust store, libcurl can
silently reinstall the cached store after the callback returns. A certificate
trusted by the cached store but rejected by the callback-selected store is
then incorrectly accepted.
{
"affected": [],
"aliases": [
"CVE-2026-82208"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-06T18:17:22Z",
"severity": "HIGH"
},
"details": "With the wolfSSL backend, when CA caching is enabled and an\n`CURLOPT_SSL_CTX_FUNCTION` callback replaces the trust store, libcurl can\nsilently reinstall the cached store after the callback returns. A certificate\ntrusted by the cached store but rejected by the callback-selected store is\nthen incorrectly accepted.",
"id": "GHSA-8rq8-f59m-9cjg",
"modified": "2026-09-08T21:33:03Z",
"published": "2026-09-06T18:34:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82208"
},
{
"type": "WEB",
"url": "https://hackerone.com/reports/3973090"
},
{
"type": "WEB",
"url": "https://curl.se/docs/CVE-2026-82208.html"
},
{
"type": "WEB",
"url": "https://curl.se/docs/CVE-2026-82208.json"
}
],
"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-8V53-23MX-HCF9
Vulnerability from github – Published: 2023-01-27 00:30 – Updated: 2023-01-27 01:15Improper Certificate Validation in GitHub repository pyload/pyload prior to 0.5.0b3.dev44.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "pyload-ng"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.5.0b3.dev44"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2023-0509"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": true,
"github_reviewed_at": "2023-01-27T01:15:05Z",
"nvd_published_at": "2023-01-26T22:15:00Z",
"severity": "HIGH"
},
"details": "Improper Certificate Validation in GitHub repository pyload/pyload prior to 0.5.0b3.dev44.",
"id": "GHSA-8v53-23mx-hcf9",
"modified": "2023-01-27T01:15:05Z",
"published": "2023-01-27T00:30:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-0509"
},
{
"type": "WEB",
"url": "https://github.com/pyload/pyload/commit/a9098bdf7406e6faf9df3da6ff2d584e90c13bbb"
},
{
"type": "PACKAGE",
"url": "https://github.com/pyload/pyload"
},
{
"type": "WEB",
"url": "https://huntr.dev/bounties/a370e0c2-a41c-4871-ad91-bc6f31a8e839"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "Improper Certificate Validation in pyload-ng"
}
GHSA-8V79-5VWG-M22Q
Vulnerability from github – Published: 2026-07-29 18:31 – Updated: 2026-07-29 21:30Improper certificate validation in the Devolutions Server connection handling in Devolutions Password Manager 2026.2.1.0 and earlier on Android, iOS, and macOS allows an adjacent-network attacker to intercept and modify sensitive information via a forged TLS certificate.
{
"affected": [],
"aliases": [
"CVE-2026-8497"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-29T18:16:58Z",
"severity": "HIGH"
},
"details": "Improper certificate validation in the Devolutions Server connection handling in Devolutions Password Manager 2026.2.1.0 and earlier on Android, iOS, and macOS allows an adjacent-network attacker to intercept and modify sensitive information via a forged TLS certificate.",
"id": "GHSA-8v79-5vwg-m22q",
"modified": "2026-07-29T21:30:59Z",
"published": "2026-07-29T18:31:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8497"
},
{
"type": "WEB",
"url": "https://devolutions.net/security/advisories/DEVO-2026-0027"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-8VPH-24QM-4XG2
Vulnerability from github – Published: 2022-05-14 01:51 – Updated: 2022-05-14 01:51AudioCodes 440HD and 450HD devices 3.1.2.89 and earlier allows man-in-the-middle attackers to obtain sensitive credential information by leveraging failure to validate X.509 certificates when used with an on-premise installation with Skype for Business.
{
"affected": [],
"aliases": [
"CVE-2018-18567"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-10-24T22:29:00Z",
"severity": "MODERATE"
},
"details": "AudioCodes 440HD and 450HD devices 3.1.2.89 and earlier allows man-in-the-middle attackers to obtain sensitive credential information by leveraging failure to validate X.509 certificates when used with an on-premise installation with Skype for Business.",
"id": "GHSA-8vph-24qm-4xg2",
"modified": "2022-05-14T01:51:59Z",
"published": "2022-05-14T01:51:59Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-18567"
},
{
"type": "WEB",
"url": "https://seclists.org/bugtraq/2018/Oct/32"
},
{
"type": "WEB",
"url": "https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2018-026.txt"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1041956"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-8W9V-97H7-M2J5
Vulnerability from github – Published: 2022-05-24 17:09 – Updated: 2022-05-24 17:09An issue was discovered in openfortivpn 1.11.0 when used with OpenSSL 1.0.2 or later. tunnel.c mishandles certificate validation because the hostname check operates on uninitialized memory. The outcome is that a valid certificate is never accepted (only a malformed certificate may be accepted).
{
"affected": [],
"aliases": [
"CVE-2020-7042"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-02-27T18:15:00Z",
"severity": "MODERATE"
},
"details": "An issue was discovered in openfortivpn 1.11.0 when used with OpenSSL 1.0.2 or later. tunnel.c mishandles certificate validation because the hostname check operates on uninitialized memory. The outcome is that a valid certificate is never accepted (only a malformed certificate may be accepted).",
"id": "GHSA-8w9v-97h7-m2j5",
"modified": "2022-05-24T17:09:52Z",
"published": "2022-05-24T17:09:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-7042"
},
{
"type": "WEB",
"url": "https://github.com/adrienverge/openfortivpn/issues/536"
},
{
"type": "WEB",
"url": "https://github.com/adrienverge/openfortivpn/commit/9eee997d599a89492281fc7ffdd79d88cd61afc3"
},
{
"type": "WEB",
"url": "https://github.com/adrienverge/openfortivpn/commit/cd9368c6a1b4ef91d77bb3fdbe2e5bc34aa6f4c4"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CKNKSGBVYGRRVRLFEFBEKUEJYJR5LWOF"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FF6HYIBREQGATRM5COF57MRQWKOKCWZ3"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SRVVNXCNTNMPCIAZIVR4FAGYCSU53FNA"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00009.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00011.html"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-8WCX-C245-JV4V
Vulnerability from github – Published: 2022-05-17 02:39 – Updated: 2025-04-20 03:39The "BNB Mobile Banking" by Brady National Bank app 3.0.0 -- aka bnb-mobile-banking/id674215747 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-2017-9582"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-06-16T12:29:00Z",
"severity": "MODERATE"
},
"details": "The \"BNB Mobile Banking\" by Brady National Bank app 3.0.0 -- aka bnb-mobile-banking/id674215747 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-8wcx-c245-jv4v",
"modified": "2025-04-20T03:39:13Z",
"published": "2022-05-17T02:39:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-9582"
},
{
"type": "WEB",
"url": "https://medium.com/%40chronic_9612/advisory-44-credit-union-apps-for-ios-may-allow-login-credential-exposure-4d2f380b85c5"
},
{
"type": "WEB",
"url": "https://medium.com/@chronic_9612/advisory-44-credit-union-apps-for-ios-may-allow-login-credential-exposure-4d2f380b85c5"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-8WF9-G5Q8-GG97
Vulnerability from github – Published: 2026-06-15 21:30 – Updated: 2026-06-16 15:33In OCaml-TLS before 2.1.0, the server implementation does insufficient checks of the certificate provided by the client (when doing client authentication), which allows impersonation with certificates that are not meant for client authentication (because of KeyUsage and ExtendedKeyUsage).
{
"affected": [],
"aliases": [
"CVE-2026-45389"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-15T20:16:28Z",
"severity": "CRITICAL"
},
"details": "In OCaml-TLS before 2.1.0, the server implementation does insufficient checks of the certificate provided by the client (when doing client authentication), which allows impersonation with certificates that are not meant for client authentication (because of KeyUsage and ExtendedKeyUsage).",
"id": "GHSA-8wf9-g5q8-gg97",
"modified": "2026-06-16T15:33:47Z",
"published": "2026-06-15T21:30:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45389"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/OSEC-2026-07"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-8X8Q-89W8-F24C
Vulnerability from github – Published: 2025-01-15 21:31 – Updated: 2025-10-14 21:30An issue in the native clients for Amazon WorkSpaces Clients when running PCoIP protocol may allow an attacker to access remote sessions via man-in-the-middle.
{
"affected": [],
"aliases": [
"CVE-2025-0501"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-15T19:15:27Z",
"severity": "HIGH"
},
"details": "An issue in the native clients for Amazon WorkSpaces Clients when running PCoIP protocol may allow an attacker to access remote sessions via man-in-the-middle.",
"id": "GHSA-8x8q-89w8-f24c",
"modified": "2025-10-14T21:30:25Z",
"published": "2025-01-15T21:31:41Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-0501"
},
{
"type": "WEB",
"url": "https://aws.amazon.com/security/security-bulletins/AWS-2025-001"
},
{
"type": "WEB",
"url": "https://docs.aws.amazon.com/workspaces/latest/userguide/amazon-workspaces-android-client.html#android-release-notes"
},
{
"type": "WEB",
"url": "https://docs.aws.amazon.com/workspaces/latest/userguide/amazon-workspaces-linux-client.html#linux-release-notes"
},
{
"type": "WEB",
"url": "https://docs.aws.amazon.com/workspaces/latest/userguide/amazon-workspaces-osx-client.html#osx-release-notes"
},
{
"type": "WEB",
"url": "https://docs.aws.amazon.com/workspaces/latest/userguide/amazon-workspaces-windows-client.html#windows-release-notes"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:H/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-8XJ5-7J6Q-7C3R
Vulnerability from github – Published: 2024-12-18 18:30 – Updated: 2024-12-18 18:30IBM Storage Defender - Resiliency Service 2.0.0 through 2.0.9 does not properly validate a certificate which could allow an attacker to spoof a trusted entity by interfering in the communication path between the host and client.
{
"affected": [],
"aliases": [
"CVE-2024-47119"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-12-18T16:15:13Z",
"severity": "MODERATE"
},
"details": "IBM Storage Defender - Resiliency Service 2.0.0 through 2.0.9 does not properly validate a certificate which could allow an attacker to spoof a trusted entity by interfering in the communication path between the host and client.",
"id": "GHSA-8xj5-7j6q-7c3r",
"modified": "2024-12-18T18:30:52Z",
"published": "2024-12-18T18:30:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-47119"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7178587"
}
],
"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"
}
]
}
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.