GHSA-86w9-cpqp-85rv

node-forge RSA PKCS#1 v1.5 signature verification accepts extra nested DigestAlgorithm elements

En bref

Publiée: 2026-09-03 21:31 UTC
Mise à jour: 2026-10-01 21:40 UTC
CVE: CVE-2026-33894, CVE-2026-85393
Alias: GHSA-ppp5-5v6c-4jwp
CVSS_V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS_V4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Description

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.

Paquets affectés

Paquet	Versions
npm · node-forge	introduced 0, last affected 1.4.0

Références

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

Sources

Source	Licence
OSV.dev	CC-BY 4.0 — GitHub Advisory Database