CVE-2026-33896
Forge has a basicConstraints bypass in its certificate chain verification (RFC 5280 violation)
CRITICAL 9.1EPSS 0.5%
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.
- Affected
- digitalbazaar · forge
- CVSS v3.1 NVD
- 9.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - CVSS v3.1 CNA
- 7.4 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - EPSS
- 0.50% chance of exploitation in the next 30 days, 42nd percentile
- Published
- 2026-03-27
- Updated
- 2026-09-04
Proof-of-concept exploits (1)
Security advisories
- digitalbazaar/forge/security/advisories/GHSA-2328-f5f3-gj25
- digitalbazaar/forge/commit/2e492832fb25227e6b647cbe1ac981c123171e90