CVE-2026-85393

EUVD-2026-70670
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
digitalbazaarforge
𝑥
≤ 1.4.0
CNA
Common Weakness Enumeration
References
https://github.com/advisories/GHSA-ppp5-5v6c-4jwp
https://github.com/digitalbazaar/forge
https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/asn1.js
https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/rsa.js
https://github.com/digitalbazaar/forge/issues/1149
https://www.vulncheck.com/advisories/node-forge-through-1.4.0-rsa-pkcs-1-1.5-signature-forgery-via-nested-digestalgorithm-padding
https://github.com/advisories/GHSA-ppp5-5v6c-4jwp