High
Forge has a basicConstraints bypass in its certificate chain verification (RFC 5280 violation)
Type: advisorySources: OSV
Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. Prior to version 1.4.0, `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. Version 1.4.0 patches the issue.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-33896
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 05:44 UTC · Revision 1
Source evidence
Forge has a basicConstraints bypass in its certificate chain verification (RFC 5280 violation)
core-osv · Original sourcePublished 27 Mar 2026, 20:50 UTC
Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. Prior to version 1.4.0, `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. Version 1.4.0 patches the issue.
osv:CVE-2026-33896
Complete source record
{
"id": "4614a763a7c5b3e20ad5e8cdda4c55d29878f1c6e923b89cac8b4a7597b8868f",
"url": "https://osv.dev/vulnerability/CVE-2026-33896",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Forge has a basicConstraints bypass in its certificate chain verification (RFC 5280 violation)",
"summary": "Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. Prior to version 1.4.0, `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. Version 1.4.0 patches the issue.",
"evidence": "osv:CVE-2026-33896",
"products": [],
"severity": "high",
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"id": "CVE-2026-33896",
"aliases": [
"CVE-2026-33896",
"GHSA-2328-f5f3-gj25"
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"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"
}
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"affected": [
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"source": "REFERENCES_COMMIT"
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"database_specific": {
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],
"modified": "2026-10-28T02:30:26.461025733Z",
"provider": "osv",
"references": [
"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33896.json",
"https://access.redhat.com/errata/RHSA-2026:13826",
"https://access.redhat.com/errata/RHSA-2026:24761",
"https://access.redhat.com/errata/RHSA-2026:34342",
"https://access.redhat.com/errata/RHSA-2026:9742",
"https://access.redhat.com/security/cve/CVE-2026-33896",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33896.json",
"https://github.com/digitalbazaar/forge/security/advisories/GHSA-2328-f5f3-gj25",
"https://nvd.nist.gov/vuln/detail/CVE-2026-33896",
"https://bugzilla.redhat.com/show_bug.cgi?id=2452458",
"https://github.com/digitalbazaar/forge/commit/2e492832fb25227e6b647cbe1ac981c123171e90"
],
"provider_metadata": {
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],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33896.json"
}
},
"related_cves": [
{
"value": "CVE-2026-33896",
"evidence": "/id"
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"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 492801,
"published_at": "2026-03-27T20:50:03.418+00:00"
}