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-2P88-V9R5-P4MP
Vulnerability from github – Published: 2022-05-17 04:31 – Updated: 2022-05-17 04:31The Smart Call Home (SCH) implementation in Cisco ASA Software 8.2 before 8.2(5.50), 8.4 before 8.4(7.15), 8.6 before 8.6(1.14), 8.7 before 8.7(1.13), 9.0 before 9.0(4.8), and 9.1 before 9.1(5.1) allows remote attackers to bypass certificate validation via an arbitrary VeriSign certificate, aka Bug ID CSCun10916.
{
"affected": [],
"aliases": [
"CVE-2014-3394"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2014-10-10T10:55:00Z",
"severity": "MODERATE"
},
"details": "The Smart Call Home (SCH) implementation in Cisco ASA Software 8.2 before 8.2(5.50), 8.4 before 8.4(7.15), 8.6 before 8.6(1.14), 8.7 before 8.7(1.13), 9.0 before 9.0(4.8), and 9.1 before 9.1(5.1) allows remote attackers to bypass certificate validation via an arbitrary VeriSign certificate, aka Bug ID CSCun10916.",
"id": "GHSA-2p88-v9r5-p4mp",
"modified": "2022-05-17T04:31:07Z",
"published": "2022-05-17T04:31:07Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2014-3394"
},
{
"type": "WEB",
"url": "http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20141008-asa"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-2PHC-GXQ3-33RM
Vulnerability from github – Published: 2022-05-17 02:39 – Updated: 2025-04-20 03:39The "CFB Mobile Banking" by Citizens First Bank Wisconsin app 3.0.1 -- aka cfb-mobile-banking/id1081102805 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-2017-9596"
],
"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 \"CFB Mobile Banking\" by Citizens First Bank Wisconsin app 3.0.1 -- aka cfb-mobile-banking/id1081102805 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-2phc-gxq3-33rm",
"modified": "2025-04-20T03:39:14Z",
"published": "2022-05-17T02:39:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-9596"
},
{
"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-2PQV-GJX5-J94F
Vulnerability from github – Published: 2022-05-13 01:28 – Updated: 2022-05-13 01:28A potential vulnerability has been identified in HP Remote Graphics Software’s certificate authentication process version 7.5.0 and earlier.
{
"affected": [],
"aliases": [
"CVE-2018-5926"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-03-27T16:29:00Z",
"severity": "CRITICAL"
},
"details": "A potential vulnerability has been identified in HP Remote Graphics Software\u2019s certificate authentication process version 7.5.0 and earlier.",
"id": "GHSA-2pqv-gjx5-j94f",
"modified": "2022-05-13T01:28:29Z",
"published": "2022-05-13T01:28:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-5926"
},
{
"type": "WEB",
"url": "https://support.hp.com/us-en/document/c06201418"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-2PW7-G86G-76Q7
Vulnerability from github – Published: 2026-05-27 00:31 – Updated: 2026-09-03 15:31A flaw was found in gnutls. When validating certificates, an oversized Subject Alternative Name (SAN) could cause the validation process to incorrectly fall back to checking the Common Name (CN) field. This could allow a remote attacker to bypass proper certificate validation, potentially leading to spoofing or man-in-the-middle attacks.
{
"affected": [],
"aliases": [
"CVE-2026-42013"
],
"database_specific": {
"cwe_ids": [
"CWE-1284",
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-26T22:16:42Z",
"severity": "HIGH"
},
"details": "A flaw was found in gnutls. When validating certificates, an oversized Subject Alternative Name (SAN) could cause the validation process to incorrectly fall back to checking the Common Name (CN) field. This could allow a remote attacker to bypass proper certificate validation, potentially leading to spoofing or man-in-the-middle attacks.",
"id": "GHSA-2pw7-g86g-76q7",
"modified": "2026-09-03T15:31:53Z",
"published": "2026-05-27T00:31:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42013"
},
{
"type": "WEB",
"url": "https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-8"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467448"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-42013"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:60019"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:59831"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:58981"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:57483"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:56853"
},
{
"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-2026:40762"
},
{
"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:N/S:U/C:L/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-2PWF-98XM-HGM2
Vulnerability from github – Published: 2022-05-14 02:52 – Updated: 2022-05-14 02:52OpenFire XMPP Server before 3.10 accepts self-signed certificates, which allows remote attackers to perform unspecified spoofing attacks.
{
"affected": [],
"aliases": [
"CVE-2014-3451"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-08-18T18:29:00Z",
"severity": "HIGH"
},
"details": "OpenFire XMPP Server before 3.10 accepts self-signed certificates, which allows remote attackers to perform unspecified spoofing attacks.",
"id": "GHSA-2pwf-98xm-hgm2",
"modified": "2022-05-14T02:52:42Z",
"published": "2022-05-14T02:52:42Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2014-3451"
},
{
"type": "WEB",
"url": "https://community.igniterealtime.org/blogs/ignite/2015/04/22/openfire-3100-released"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/131614/OpenFire-XMPP-3.9.3-Certificate-Handling.html"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2015/04/23/16"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/archive/1/535363/100/1100/threaded"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/74305"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-2Q9R-QXXC-WGH3
Vulnerability from github – Published: 2022-05-14 02:57 – Updated: 2025-04-20 03:39The "RVCB Mobile" by RVCB Mobile Banking app 3.0.0 -- aka rvcb-mobile/id757928895 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-2017-9578"
],
"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 \"RVCB Mobile\" by RVCB Mobile Banking app 3.0.0 -- aka rvcb-mobile/id757928895 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-2q9r-qxxc-wgh3",
"modified": "2025-04-20T03:39:12Z",
"published": "2022-05-14T02:57:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-9578"
},
{
"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-2QXW-7FMX-GQFM
Vulnerability from github – Published: 2026-02-02 06:30 – Updated: 2026-03-27 00:31A flaw was found in foreman_kubevirt. When configuring the connection to OpenShift, the system disables SSL verification if a Certificate Authority (CA) certificate is not explicitly set. This insecure default allows a remote attacker, capable of intercepting network traffic between Satellite and OpenShift, to perform a Man-in-the-Middle (MITM) attack. Such an attack could lead to the disclosure or alteration of sensitive information.
{
"affected": [
{
"package": {
"ecosystem": "RubyGems",
"name": "foreman_kubevirt"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.4.3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-1531"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": true,
"github_reviewed_at": "2026-02-02T21:15:40Z",
"nvd_published_at": "2026-02-02T06:16:20Z",
"severity": "HIGH"
},
"details": "A flaw was found in foreman_kubevirt. When configuring the connection to OpenShift, the system disables SSL verification if a Certificate Authority (CA) certificate is not explicitly set. This insecure default allows a remote attacker, capable of intercepting network traffic between Satellite and OpenShift, to perform a Man-in-the-Middle (MITM) attack. Such an attack could lead to the disclosure or alteration of sensitive information.",
"id": "GHSA-2qxw-7fmx-gqfm",
"modified": "2026-03-27T00:31:20Z",
"published": "2026-02-02T06:30:53Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1531"
},
{
"type": "WEB",
"url": "https://github.com/theforeman/foreman_kubevirt/commit/6c9973ee59c6fbec65f165eb9ea9dd4ebb6eeef1"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:5968"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:5970"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:5971"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-1531"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2433786"
},
{
"type": "WEB",
"url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/foreman_kubevirt/CVE-2026-1531.yml"
},
{
"type": "PACKAGE",
"url": "https://github.com/theforeman/foreman_kubevirt"
}
],
"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"
}
],
"summary": "foreman_kubevirt disables SSL verification if a Certificate Authority (CA) certificate is not explicitly set"
}
GHSA-2R33-WV3M-HVXF
Vulnerability from github – Published: 2026-08-29 00:31 – Updated: 2026-08-29 00:31When mongosqld is configured with a client certificate authority file, the listener requests a client certificate during the TLS handshake but does not require one, so a client that presents no certificate is still accepted. In deployments that rely on client certificates as the sole means of identifying users, a remote party with network access to the listener can therefore establish a session and read the MongoDB data exposed through the connector.
{
"affected": [],
"aliases": [
"CVE-2026-81518"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-28T22:16:54Z",
"severity": "HIGH"
},
"details": "When mongosqld is configured with a client certificate authority file, the listener requests a client certificate during the TLS handshake but does not require one, so a client that presents no certificate is still accepted. In deployments that rely on client certificates as the sole means of identifying users, a remote party with network access to the listener can therefore establish a session and read the MongoDB data exposed through the connector.",
"id": "GHSA-2r33-wv3m-hvxf",
"modified": "2026-08-29T00:31:03Z",
"published": "2026-08-29T00:31:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81518"
},
{
"type": "WEB",
"url": "https://www.mongodb.com/docs/bi-connector/current/release-notes"
}
],
"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"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/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-2R56-QGV4-C7WJ
Vulnerability from github – Published: 2026-06-22 15:30 – Updated: 2026-06-22 15:30IBM Db2 on Cloud Pak for Data and Db2 Warehouse on Cloud Pak for Data versions 4.8, 5.0, 5.1, 5.2, 5.3 could allow a privileged user to perform operations and obtain sensitive information outside of their authority due to improper token validation.
{
"affected": [],
"aliases": [
"CVE-2025-2669"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-22T14:16:21Z",
"severity": "MODERATE"
},
"details": "IBM Db2 on Cloud Pak for Data and Db2 Warehouse on Cloud Pak for Data versions 4.8, 5.0, 5.1, 5.2, 5.3 could allow a privileged user to perform operations and obtain sensitive information outside of their authority due to improper token validation.",
"id": "GHSA-2r56-qgv4-c7wj",
"modified": "2026-06-22T15:30:43Z",
"published": "2026-06-22T15:30:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-2669"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7277112"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-2R8V-P65X-3663
Vulnerability from github – Published: 2026-07-01 20:32 – Updated: 2026-07-01 20:32Impact
The QUIC client did not authenticate the server during the TLS 1.3 handshake. The CertificateVerify signature was not checked, the certificate chain was not validated, and the hostname was not compared against the certificate, so verify was effectively a no-op on the client. A man-in-the-middle on the network path could present any certificate and impersonate any server, defeating the confidentiality and integrity of the connection. HTTP/3 uses the same client and was equally affected. Handshakes authenticated by a PSK (session resumption) are not affected, because the peer is authenticated by the PSK binder and no certificate is sent.
Patches
Fixed in 1.4.4. The client now verifies the CertificateVerify signature, validates the certificate chain against the trust store (cacerts option, the operating system store by default), and checks the hostname. Client verify now defaults to on; set verify => false to accept any certificate (for example a self-signed test server).
Workarounds
None before 1.4.4. verify => true had no effect, and inspecting the certificate after connecting does not help because without the signature check the peer is never proven to own the certificate it presents.
Credit
Reported by benmmurphy.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 1.4.3"
},
"package": {
"ecosystem": "Hex",
"name": "quic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-49457"
],
"database_specific": {
"cwe_ids": [
"CWE-295",
"CWE-297"
],
"github_reviewed": true,
"github_reviewed_at": "2026-07-01T20:32:34Z",
"nvd_published_at": null,
"severity": "CRITICAL"
},
"details": "### Impact\n\nThe QUIC client did not authenticate the server during the TLS 1.3 handshake. The CertificateVerify signature was not checked, the certificate chain was not validated, and the hostname was not compared against the certificate, so `verify` was effectively a no-op on the client. A man-in-the-middle on the network path could present any certificate and impersonate any server, defeating the confidentiality and integrity of the connection. HTTP/3 uses the same client and was equally affected. Handshakes authenticated by a PSK (session resumption) are not affected, because the peer is authenticated by the PSK binder and no certificate is sent.\n\n### Patches\n\nFixed in 1.4.4. The client now verifies the CertificateVerify signature, validates the certificate chain against the trust store (`cacerts` option, the operating system store by default), and checks the hostname. Client `verify` now defaults to on; set `verify =\u003e false` to accept any certificate (for example a self-signed test server).\n\n### Workarounds\n\nNone before 1.4.4. `verify =\u003e true` had no effect, and inspecting the certificate after connecting does not help because without the signature check the peer is never proven to own the certificate it presents.\n\n### Credit\n\nReported by benmmurphy.",
"id": "GHSA-2r8v-p65x-3663",
"modified": "2026-07-01T20:32:34Z",
"published": "2026-07-01T20:32:34Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/benoitc/erlang_quic/security/advisories/GHSA-2r8v-p65x-3663"
},
{
"type": "PACKAGE",
"url": "https://github.com/benoitc/erlang_quic"
}
],
"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"
}
],
"summary": "QUIC has Broken TLS verification"
}
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.