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Vulnerability record · CVE-2026-33896 · published 27 March 2026

CVE-2026-33896: Digitalbazaar forge improper certificate validation vulnerability

Digitalbazaar · Forge

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.

9.1 CVSS 3.1 Critical EPSS 0.50% · top 59.7% CWE-295 · Improper certificate validation
9.1CVSS 3.1 base score
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References, 2 tagged exploit
4 Sep 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/digitalbazaar/forge/commit/2e492832fb25227e6b647cbe1ac981c123171e90 Patch
https://github.com/digitalbazaar/forge/security/advisories/GHSA-2328-f5f3-gj25 ExploitVendor Advisory
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://bugzilla.redhat.com/show_bug.cgi?id=2452458
https://github.com/digitalbazaar/forge/security/advisories/GHSA-2328-f5f3-gj25 ExploitVendor Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33896.json

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-33896), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.