CWE-295
AllowedImproper Certificate Validation
Abstraction: Base · Status: Draft
The product does not validate, or incorrectly validates, a certificate.
2156 vulnerabilities reference this CWE, most recent first.
GHSA-7GR4-MRJX-CJX9
Vulnerability from github – Published: 2022-05-14 03:29 – Updated: 2022-05-14 03:29The int_x509_param_set_hosts function in lib/libcrypto/x509/x509_vpm.c in LibreSSL 2.7.0 before 2.7.1 does not support a certain special case of a zero name length, which causes silent omission of hostname verification, and consequently allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate. NOTE: the LibreSSL documentation indicates that this special case is supported, but the BoringSSL documentation does not.
{
"affected": [],
"aliases": [
"CVE-2018-8970"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-03-24T21:29:00Z",
"severity": "HIGH"
},
"details": "The int_x509_param_set_hosts function in lib/libcrypto/x509/x509_vpm.c in LibreSSL 2.7.0 before 2.7.1 does not support a certain special case of a zero name length, which causes silent omission of hostname verification, and consequently allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate. NOTE: the LibreSSL documentation indicates that this special case is supported, but the BoringSSL documentation does not.",
"id": "GHSA-7gr4-mrjx-cjx9",
"modified": "2022-05-14T03:29:32Z",
"published": "2022-05-14T03:29:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-8970"
},
{
"type": "WEB",
"url": "https://github.com/libressl-portable/openbsd/commit/0654414afcce51a16d35d05060190a3ec4618d42"
},
{
"type": "WEB",
"url": "https://boringssl.googlesource.com/boringssl/+/e759a9cd84198613199259dbed401f4951747cff"
},
{
"type": "WEB",
"url": "https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.1-relnotes.txt"
}
],
"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"
}
]
}
GHSA-7H42-5VJ2-CQ39
Vulnerability from github – Published: 2018-03-13 20:42 – Updated: 2023-09-13 22:19brianleroux tiny-json-http version all versions since commit 9b8e74a232bba4701844e07bcba794173b0238a8 (Oct 29 2016) contains a Missing SSL certificate validation vulnerability in The libraries core functionality is affected. that can result in Exposes the user to man-in-the-middle attacks.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "tiny-json-http"
},
"ranges": [
{
"events": [
{
"introduced": "1.0.1"
},
{
"fixed": "7.0.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2018-1000096"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T21:22:50Z",
"nvd_published_at": null,
"severity": "HIGH"
},
"details": "brianleroux tiny-json-http version all versions since commit [9b8e74a232bba4701844e07bcba794173b0238a8](https://github.com/brianleroux/tiny-json-http/commit/9b8e74a232bba4701844e07bcba794173b0238a8) (Oct 29 2016) contains a Missing SSL certificate validation vulnerability in The libraries core functionality is affected. that can result in Exposes the user to man-in-the-middle attacks.",
"id": "GHSA-7h42-5vj2-cq39",
"modified": "2023-09-13T22:19:39Z",
"published": "2018-03-13T20:42:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000096"
},
{
"type": "WEB",
"url": "https://github.com/brianleroux/tiny-json-http/pull/15"
},
{
"type": "WEB",
"url": "https://github.com/brianleroux/tiny-json-http/commit/3c1e36d8bef3ef5fd8e4447f816d5ffe2bfc3190"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-7h42-5vj2-cq39"
},
{
"type": "PACKAGE",
"url": "https://github.com/brianleroux/tiny-json-http"
}
],
"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:H",
"type": "CVSS_V3"
}
],
"summary": "tiny-json-http missing SSL certificate validation"
}
GHSA-7H49-XVM6-M9X4
Vulnerability from github – Published: 2022-05-13 01:05 – Updated: 2022-05-13 01:05The Thycotic Password Manager Secret Server application through 2.3 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-2015-4094"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2015-06-02T14:59:00Z",
"severity": "MODERATE"
},
"details": "The Thycotic Password Manager Secret Server application through 2.3 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-7h49-xvm6-m9x4",
"modified": "2022-05-13T01:05:18Z",
"published": "2022-05-13T01:05:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2015-4094"
},
{
"type": "WEB",
"url": "http://www.info-sec.ca/advisories/Thycotic-SecretServer.html"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-7H6J-2268-FHCM
Vulnerability from github – Published: 2021-09-02 22:00 – Updated: 2026-03-06 22:05configurationwatcher.go in Traefik 2.x before 2.1.4 and TraefikEE 2.0.0 mishandles the purging of certificate contents from providers before logging.
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/traefik/traefik"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-9321"
],
"database_specific": {
"cwe_ids": [
"CWE-200",
"CWE-295"
],
"github_reviewed": true,
"github_reviewed_at": "2021-08-02T22:19:23Z",
"nvd_published_at": "2020-03-16T19:15:00Z",
"severity": "MODERATE"
},
"details": "configurationwatcher.go in Traefik 2.x before 2.1.4 and TraefikEE 2.0.0 mishandles the purging of certificate contents from providers before logging.",
"id": "GHSA-7h6j-2268-fhcm",
"modified": "2026-03-06T22:05:57Z",
"published": "2021-09-02T22:00:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-9321"
},
{
"type": "WEB",
"url": "https://github.com/containous/traefik/pull/6281"
},
{
"type": "WEB",
"url": "https://github.com/traefik/traefik/pull/6281"
},
{
"type": "WEB",
"url": "https://github.com/containous/traefik/releases/tag/v2.1.4"
},
{
"type": "PACKAGE",
"url": "https://github.com/traefik/traefik"
},
{
"type": "WEB",
"url": "https://github.com/traefik/traefik/releases/tag/v2.1.4"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C",
"type": "CVSS_V3"
}
],
"summary": "Traefik has an Improper Certificate Handling issue"
}
GHSA-7H6J-6653-FX8C
Vulnerability from github – Published: 2022-12-22 21:30 – Updated: 2025-04-16 18:31After accepting an untrusted certificate, handling an empty pkcs7 sequence as part of the certificate data could have lead to a crash. This crash is believed to be unexploitable. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5.
{
"affected": [],
"aliases": [
"CVE-2022-22747"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-12-22T20:15:00Z",
"severity": "MODERATE"
},
"details": "After accepting an untrusted certificate, handling an empty pkcs7 sequence as part of the certificate data could have lead to a crash. This crash is believed to be unexploitable. This vulnerability affects Firefox ESR \u003c 91.5, Firefox \u003c 96, and Thunderbird \u003c 91.5.",
"id": "GHSA-7h6j-6653-fx8c",
"modified": "2025-04-16T18:31:36Z",
"published": "2022-12-22T21:30:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-22747"
},
{
"type": "WEB",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1735028"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2022-01"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2022-02"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2022-03"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-7HF4-2CMF-XPCC
Vulnerability from github – Published: 2022-05-13 01:35 – Updated: 2022-05-13 01:35A vulnerability in the Extensible Authentication Protocol-Transport Layer Security (EAP-TLS) certificate validation during EAP authentication for the Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to cause the ISE application server to restart unexpectedly, causing a denial of service (DoS) condition on an affected system. The vulnerability is due to incomplete input validation of the client EAP-TLS certificate. An attacker could exploit this vulnerability by initiating EAP authentication over TLS to the ISE with a crafted EAP-TLS certificate. A successful exploit could allow the attacker to restart the ISE application server, resulting in a DoS condition on the affected system. The ISE application could continue to restart while the client attempts to establish the EAP authentication connection. If an attacker attempted to import the same EAP-TLS certificate to the ISE trust store, it could trigger a DoS condition on the affected system. This exploit vector would require the attacker to have valid administrator credentials. The vulnerability affects Cisco ISE, Cisco ISE Express, and Cisco ISE Virtual Appliance. Cisco Bug IDs: CSCve31857.
{
"affected": [],
"aliases": [
"CVE-2018-0277"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-05-17T03:29:00Z",
"severity": "HIGH"
},
"details": "A vulnerability in the Extensible Authentication Protocol-Transport Layer Security (EAP-TLS) certificate validation during EAP authentication for the Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to cause the ISE application server to restart unexpectedly, causing a denial of service (DoS) condition on an affected system. The vulnerability is due to incomplete input validation of the client EAP-TLS certificate. An attacker could exploit this vulnerability by initiating EAP authentication over TLS to the ISE with a crafted EAP-TLS certificate. A successful exploit could allow the attacker to restart the ISE application server, resulting in a DoS condition on the affected system. The ISE application could continue to restart while the client attempts to establish the EAP authentication connection. If an attacker attempted to import the same EAP-TLS certificate to the ISE trust store, it could trigger a DoS condition on the affected system. This exploit vector would require the attacker to have valid administrator credentials. The vulnerability affects Cisco ISE, Cisco ISE Express, and Cisco ISE Virtual Appliance. Cisco Bug IDs: CSCve31857.",
"id": "GHSA-7hf4-2cmf-xpcc",
"modified": "2022-05-13T01:35:29Z",
"published": "2022-05-13T01:35:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-0277"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180516-iseeap"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/104212"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1040922"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-7HFW-R8QC-89V4
Vulnerability from github – Published: 2026-03-07 00:30 – Updated: 2026-09-15 12:31When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly applied, and only the last constraint will be considered.
{
"affected": [],
"aliases": [
"CVE-2026-27137"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-06T22:16:00Z",
"severity": "HIGH"
},
"details": "When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly applied, and only the last constraint will be considered.",
"id": "GHSA-7hfw-r8qc-89v4",
"modified": "2026-09-15T12:31:30Z",
"published": "2026-03-07T00:30:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27137"
},
{
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"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27137.json"
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"url": "https://access.redhat.com/errata/RHSA-2026:8151"
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"url": "https://access.redhat.com/errata/RHSA-2026:7291"
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"severity": [
{
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"type": "CVSS_V3"
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}
GHSA-7HHJ-8FWV-M5HC
Vulnerability from github – Published: 2026-05-27 00:31 – Updated: 2026-08-25 12:31A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.
{
"affected": [],
"aliases": [
"CVE-2026-42012"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-26T22:16:41Z",
"severity": "HIGH"
},
"details": "A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.",
"id": "GHSA-7hhj-8fwv-m5hc",
"modified": "2026-08-25T12:31:19Z",
"published": "2026-05-27T00:31:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42012"
},
{
"type": "WEB",
"url": "https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-7"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467441"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-42012"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:58981"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:43575"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:41921"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:33125"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:32962"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:30850"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:30849"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:30004"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:29197"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:26409"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:26319"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:20613"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:20612"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:20611"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:13274"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-7HQ7-5M7P-R2PP
Vulnerability from github – Published: 2026-05-26 13:30 – Updated: 2026-05-26 13:30Szafir SDK returns a success status code from the cryptographic digital signature verification process (i.e. /VerifyingTaskItem/Signature/VerificationResult/Result/@code == 0, "Positively verified") even when the trust status of the signer's certificate could not be established (i.e. /VerifyingTaskItem/Signature/VerificationResult/SigningCertificate/@certificateType == "nondetermined"). This causes consuming applications to incorrectly treat the signature as valid despite an unverified certificate chain, enabling authentication bypass and user impersonation.
This issue was fixed in version 463.
{
"affected": [],
"aliases": [
"CVE-2026-9058"
],
"database_specific": {
"cwe_ids": [
"CWE-295",
"CWE-393"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-25T14:16:27Z",
"severity": "CRITICAL"
},
"details": "Szafir SDK returns a success status code from the cryptographic digital signature verification process (i.e. /VerifyingTaskItem/Signature/VerificationResult/Result/@code == 0, \"Positively verified\") even when the trust status of the signer\u0027s certificate could not be established (i.e. /VerifyingTaskItem/Signature/VerificationResult/SigningCertificate/@certificateType == \"nondetermined\"). This causes consuming applications to incorrectly treat the signature as valid despite an unverified certificate chain, enabling authentication bypass and user impersonation.\n\nThis issue was fixed in version 463.",
"id": "GHSA-7hq7-5m7p-r2pp",
"modified": "2026-05-26T13:30:42Z",
"published": "2026-05-26T13:30:42Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9058"
},
{
"type": "WEB",
"url": "https://cert.pl/posts/2026/05/CVE-2026-9058"
},
{
"type": "WEB",
"url": "https://www.elektronicznypodpis.pl"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/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-7JH7-FP3W-72G5
Vulnerability from github – Published: 2022-05-24 16:49 – Updated: 2024-04-04 01:13Mailvelope prior to 3.3.0 accepts or operates with invalid PGP public keys: Mailvelope allows importing keys that contain users without a valid self-certification. Keys that are obviously invalid are not rejected during import. An attacker that is able to get a victim to import a manipulated key could claim to have signed a message that originates from another person.
{
"affected": [],
"aliases": [
"CVE-2019-9148"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-07-09T21:15:00Z",
"severity": "MODERATE"
},
"details": "Mailvelope prior to 3.3.0 accepts or operates with invalid PGP public keys: Mailvelope allows importing keys that contain users without a valid self-certification. Keys that are obviously invalid are not rejected during import. An attacker that is able to get a victim to import a manipulated key could claim to have signed a message that originates from another person.",
"id": "GHSA-7jh7-fp3w-72g5",
"modified": "2024-04-04T01:13:34Z",
"published": "2022-05-24T16:49:50Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-9148"
},
{
"type": "WEB",
"url": "https://github.com/mailvelope/mailvelope/blob/master/Changelog.md#v330"
},
{
"type": "WEB",
"url": "https://www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvelope_Extensions/Mailvelope_Extensions_pdf.html"
},
{
"type": "WEB",
"url": "https://www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvelope_Extensions/Mailvelope_Extensions_pdf.pdf?__blob=publicationFile\u0026v=3"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/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.