Common Weakness Enumeration
CWE-295
AllowedImproper Certificate Validation
Abstraction: Base · Status: Draft
The product does not validate, or incorrectly validates, a certificate.
2413 vulnerabilities reference this CWE, most recent first.
GHSA-98V4-MV97-2F2X
Vulnerability from github – Published: 2026-06-16 00:34 – Updated: 2026-06-16 00:34
VLAI
Details
Improper validation of SSH host keys in Canon EOS Network Setting Tool Version 1.5.0 or earlier
Severity
{
"affected": [],
"aliases": [
"CVE-2026-9258"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-16T00:16:35Z",
"severity": "HIGH"
},
"details": "Improper validation of SSH host keys in Canon EOS Network Setting Tool Version 1.5.0 or earlier",
"id": "GHSA-98v4-mv97-2f2x",
"modified": "2026-06-16T00:34:24Z",
"published": "2026-06-16T00:34:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9258"
},
{
"type": "WEB",
"url": "https://canon.jp/support/support-info/260615vulnerability-response"
},
{
"type": "WEB",
"url": "https://psirt.canon/advisory-information/cp2026-005"
},
{
"type": "WEB",
"url": "https://www.canon-europe.com/support/product-security"
},
{
"type": "WEB",
"url": "https://www.usa.canon.com/about-us/to-our-customers/cpa2026-005-vulnerability-remediation-for-eos-network-setting-tool"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/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-98VX-JQRX-7MQ2
Vulnerability from github – Published: 2022-05-24 17:19 – Updated: 2022-05-24 17:19
VLAI
Details
TLS session reuse can lead to host certificate verification bypass in node version < 12.18.0 and < 14.4.0.
Severity
7.4 (High)
{
"affected": [],
"aliases": [
"CVE-2020-8172"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-06-08T14:15:00Z",
"severity": "MODERATE"
},
"details": "TLS session reuse can lead to host certificate verification bypass in node version \u003c 12.18.0 and \u003c 14.4.0.",
"id": "GHSA-98vx-jqrx-7mq2",
"modified": "2022-05-24T17:19:34Z",
"published": "2022-05-24T17:19:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-8172"
},
{
"type": "WEB",
"url": "https://hackerone.com/reports/811502"
},
{
"type": "WEB",
"url": "https://nodejs.org/en/blog/vulnerability/june-2020-security-releases"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202101-07"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20200625-0002"
},
{
"type": "WEB",
"url": "https://www.oracle.com//security-alerts/cpujul2021.html"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpujan2021.html"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpujul2020.html"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpuoct2020.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-98X5-JW98-6C97
Vulnerability from github – Published: 2025-09-17 19:28 – Updated: 2025-09-26 16:16
VLAI
Summary
Dragonfly's manager makes requests to external endpoints with disabled TLS authentication
Details
Impact
The Manager disables TLS certificate verification in two HTTP clients (figures 3.1 and 3.2). The clients are not configurable, so users have no way to re-enable the verification.
func getAuthToken(ctx context.Context, header http.Header) (string, error) { [skipped]
client := &http.Client{
Timeout: defaultHTTPRequesttimeout,
Transport: &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
},
}
[skipped]
}
A Manager processes dozens of preheat jobs. An adversary performs a network-level Man-in-the-Middle attack, providing invalid data to the Manager. The Manager preheats with the wrong data, which later causes a denial of service and file integrity problems.
Patches
- Dragonfy v2.1.0 and above.
Workarounds
There are no effective workarounds, beyond upgrading.
References
A third party security audit was performed by Trail of Bits, you can see the full report.
If you have any questions or comments about this advisory, please email us at dragonfly-maintainers@googlegroups.com.
Severity
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/dragonflyoss/dragonfly"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.0"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "d7y.io/dragonfly/v2"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2025-59347"
],
"database_specific": {
"cwe_ids": [
"CWE-287",
"CWE-295"
],
"github_reviewed": true,
"github_reviewed_at": "2025-09-17T19:28:14Z",
"nvd_published_at": "2025-09-17T20:15:36Z",
"severity": "MODERATE"
},
"details": "### Impact\n\nThe Manager disables TLS certificate verification in two HTTP clients (figures 3.1 and 3.2). The clients are not configurable, so users have no way to re-enable the verification.\n\n```golang\nfunc getAuthToken(ctx context.Context, header http.Header) (string, error) { [skipped]\n client := \u0026http.Client{\n Timeout: defaultHTTPRequesttimeout,\n Transport: \u0026http.Transport{\n TLSClientConfig: \u0026tls.Config{InsecureSkipVerify: true},\n },\n}\n[skipped]\n}\n```\n\nA Manager processes dozens of preheat jobs. An adversary performs a network-level Man-in-the-Middle attack, providing invalid data to the Manager. The Manager preheats with the wrong data, which later causes a denial of service and file integrity problems.\n\n### Patches\n\n- Dragonfy v2.1.0 and above.\n\n### Workarounds\n\nThere are no effective workarounds, beyond upgrading.\n\n### References\n\nA third party security audit was performed by Trail of Bits, you can see the [full report](https://github.com/dragonflyoss/dragonfly/blob/main/docs/security/dragonfly-comprehensive-report-2023.pdf).\n\nIf you have any questions or comments about this advisory, please email us at [dragonfly-maintainers@googlegroups.com](mailto:dragonfly-maintainers@googlegroups.com).",
"id": "GHSA-98x5-jw98-6c97",
"modified": "2025-09-26T16:16:47Z",
"published": "2025-09-17T19:28:14Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/dragonflyoss/dragonfly/security/advisories/GHSA-98x5-jw98-6c97"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-59347"
},
{
"type": "PACKAGE",
"url": "https://github.com/dragonflyoss/dragonfly"
},
{
"type": "WEB",
"url": "https://github.com/dragonflyoss/dragonfly/blob/main/docs/security/dragonfly-comprehensive-report-2023.pdf"
},
{
"type": "WEB",
"url": "https://pkg.go.dev/vuln/GO-2025-3966"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
"type": "CVSS_V4"
}
],
"summary": "Dragonfly\u0027s manager makes requests to external endpoints with disabled TLS authentication"
}
GHSA-9973-9X4H-PFGX
Vulnerability from github – Published: 2025-03-07 18:31 – Updated: 2026-01-22 18:50
VLAI
Details
An improper certificate validation vulnerability has been reported to affect Helpdesk. If exploited, the vulnerability could allow remote attackers to compromise the security of the system.
We have already fixed the vulnerability in the following version: Helpdesk 3.3.3 and later
Severity
{
"affected": [],
"aliases": [
"CVE-2024-50394"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-03-07T17:15:19Z",
"severity": "HIGH"
},
"details": "An improper certificate validation vulnerability has been reported to affect Helpdesk. If exploited, the vulnerability could allow remote attackers to compromise the security of the system.\n\nWe have already fixed the vulnerability in the following version:\nHelpdesk 3.3.3 and later",
"id": "GHSA-9973-9x4h-pfgx",
"modified": "2026-01-22T18:50:52Z",
"published": "2025-03-07T18:31:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50394"
},
{
"type": "WEB",
"url": "https://www.qnap.com/en/security-advisory/qsa-25-05"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/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-99CF-X4R7-CFG6
Vulnerability from github – Published: 2026-03-11 00:31 – Updated: 2026-03-11 00:31
VLAI
Details
Acrobat Reader versions 24.001.30307, 24.001.30308, 25.001.21265 and earlier are affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to spoof the identity of a signer. Exploitation of this issue requires user interaction.
Severity
5.5 (Medium)
{
"affected": [],
"aliases": [
"CVE-2026-27221"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-10T22:16:18Z",
"severity": "MODERATE"
},
"details": "Acrobat Reader versions 24.001.30307, 24.001.30308, 25.001.21265 and earlier are affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to spoof the identity of a signer. Exploitation of this issue requires user interaction.",
"id": "GHSA-99cf-x4r7-cfg6",
"modified": "2026-03-11T00:31:32Z",
"published": "2026-03-11T00:31:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27221"
},
{
"type": "WEB",
"url": "https://helpx.adobe.com/security/products/acrobat/apsb26-26.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-99F7-M726-289J
Vulnerability from github – Published: 2024-09-26 15:30 – Updated: 2024-09-26 15:30
VLAI
Details
The HCL Traveler for Microsoft Outlook executable (HTMO.exe) is being flagged as potentially Malicious Software or an Unrecognized Application.
Severity
6.7 (Medium)
{
"affected": [],
"aliases": [
"CVE-2024-30134"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-09-26T15:15:17Z",
"severity": "MODERATE"
},
"details": "The HCL Traveler for Microsoft Outlook executable (HTMO.exe) is being flagged as potentially Malicious Software or an Unrecognized Application.",
"id": "GHSA-99f7-m726-289j",
"modified": "2024-09-26T15:30:44Z",
"published": "2024-09-26T15:30:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-30134"
},
{
"type": "WEB",
"url": "https://support.hcltechsw.com/csm?id=kb_article\u0026sysparm_article=KB0114723"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-99PH-C47H-7PF8
Vulnerability from github – Published: 2025-01-15 21:31 – Updated: 2025-10-14 21:30
VLAI
Details
An issue in the native clients for Amazon WorkSpaces, Amazon AppStream 2.0, and Amazon DCV Clients may allow an attacker to access remote sessions via man-in-the-middle.
Severity
{
"affected": [],
"aliases": [
"CVE-2025-0500"
],
"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, Amazon AppStream 2.0, and Amazon DCV Clients may allow an attacker to access remote sessions via man-in-the-middle.",
"id": "GHSA-99ph-c47h-7pf8",
"modified": "2025-10-14T21:30:25Z",
"published": "2025-01-15T21:31:41Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-0500"
},
{
"type": "WEB",
"url": "https://aws.amazon.com/security/security-bulletins/AWS-2025-001"
},
{
"type": "WEB",
"url": "https://docs.aws.amazon.com/appstream2/latest/developerguide/client-release-versions.html"
},
{
"type": "WEB",
"url": "https://docs.aws.amazon.com/dcv/latest/adminguide/doc-history-release-notes.html#dcv-2023-1-16388jul"
},
{
"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: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-9C3C-227Q-3J67
Vulnerability from github – Published: 2026-06-25 21:31 – Updated: 2026-06-27 21:30
VLAI
Details
X.509 name constraint bypass via the Subject Common Name when treated as a DNS-type name. A certificate whose Subject CN violates an issuing CA's DNS name constraints could be accepted.
Severity
{
"affected": [],
"aliases": [
"CVE-2026-6731"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-25T21:16:28Z",
"severity": "MODERATE"
},
"details": "X.509 name constraint bypass via the Subject Common Name when treated as a DNS-type name. A certificate whose Subject CN violates an issuing CA\u0027s DNS name constraints could be accepted.",
"id": "GHSA-9c3c-227q-3j67",
"modified": "2026-06-27T21:30:27Z",
"published": "2026-06-25T21:31:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6731"
},
{
"type": "WEB",
"url": "https://github.com/wolfSSL/wolfssl/pull/10223"
},
{
"type": "WEB",
"url": "https://www.wolfssl.com/docs/security-vulnerabilities"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/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-9C48-27FX-7952
Vulnerability from github – Published: 2022-07-19 00:00 – Updated: 2022-07-26 00:00
VLAI
Details
In LemonLDAP::NG (aka lemonldap-ng) through 2.0.8, validity of the X.509 certificate is not checked by default when connecting to remote LDAP backends, because the default configuration of the Net::LDAPS module for Perl is used.
Severity
7.5 (High)
{
"affected": [],
"aliases": [
"CVE-2020-16093"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-07-18T00:15:00Z",
"severity": "HIGH"
},
"details": "In LemonLDAP::NG (aka lemonldap-ng) through 2.0.8, validity of the X.509 certificate is not checked by default when connecting to remote LDAP backends, because the default configuration of the Net::LDAPS module for Perl is used.",
"id": "GHSA-9c48-27fx-7952",
"modified": "2022-07-26T00:00:29Z",
"published": "2022-07-19T00:00:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-16093"
},
{
"type": "WEB",
"url": "https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues/2250"
},
{
"type": "WEB",
"url": "https://lemonldap-ng.org/download"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2023/01/msg00027.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-9CMH-266P-F4XF
Vulnerability from github – Published: 2022-05-24 19:17 – Updated: 2022-05-24 19:17
VLAI
Details
The SNKRDUNK Market Place App for iOS versions prior to 2.2.0 does not verify server certificate properly, which allows man-in-the-middle attackers to eavesdrop on and/or alter encrypted communication via a crafted certificate.
{
"affected": [],
"aliases": [
"CVE-2021-20833"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-10-13T09:15:00Z",
"severity": "HIGH"
},
"details": "The SNKRDUNK Market Place App for iOS versions prior to 2.2.0 does not verify server certificate properly, which allows man-in-the-middle attackers to eavesdrop on and/or alter encrypted communication via a crafted certificate.",
"id": "GHSA-9cmh-266p-f4xf",
"modified": "2022-05-24T19:17:25Z",
"published": "2022-05-24T19:17:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-20833"
},
{
"type": "WEB",
"url": "https://jvn.jp/en/jp/JVN10168753/index.html"
},
{
"type": "WEB",
"url": "https://snkrdunk.com/information/37"
}
],
"schema_version": "1.4.0",
"severity": []
}
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.