HIGH7.5
GHSA-86w9-cpqp-85rv
node-forge RSA PKCS#1 v1.5 signature verification accepts extra nested DigestAlgorithm elements
Details
node-forge through 1.4.0 fails to validate element count in nested DigestAlgorithm sequences during RSA PKCS#1 v1.5 signature verification. Attackers can embed garbage bytes inside the DigestAlgorithm sequence to forge valid signatures for arbitrary messages using low-exponent RSA keys. This is an incomplete fix for CVE-2026-33894.
Are you affected?
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Affected packages
npm/node-forge
Introduced in:
0No fixed version published yet for node-forge (npm). Pin to a known-safe version or switch to an alternative.
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-85393[ADVISORY]
- https://github.com/digitalbazaar/forge/issues/1149[WEB]
- https://github.com/digitalbazaar/forge/pull/1152[WEB]
- https://github.com/advisories/GHSA-ppp5-5v6c-4jwp[ADVISORY]
- https://github.com/digitalbazaar/forge[PACKAGE]
- https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/asn1.js[WEB]
- https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/rsa.js[WEB]
- https://www.vulncheck.com/advisories/node-forge-through-1.4.0-rsa-pkcs-1-1.5-signature-forgery-via-nested-digestalgorithm-padding[WEB]