node-forge RSA PKCS#1 v1.5 signature verification accepts extra nested DigestAlgorithm elements
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.
GHSA-86w9-cpqp-85rv
Primary source · Revision 2
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:GHSA-86w9-cpqp-85rv
node-forge
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "0"
},
{
"last_affected": "1.4.0"
}
]
}
],
"package": {
"name": "node-forge",
"purl": "pkg:npm/node-forge",
"ecosystem": "npm"
},
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-86w9-cpqp-85rv/GHSA-86w9-cpqp-85rv.json"
}
}
]- Related CVEs
- CVE-2026-33894
Source reference:
/aliasesCVE-2026-85393Source reference:
/aliases
Publisher severity
high
Source reference: /database_specific/severity
- Event
- #63998 · Revision 2
- Added to Heist Feed
- Publisher date