Disclosure summary
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.
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
GitHub Reviewed Security Advisories · GHSA-86w9-cpqp-85rv
Open original source · Updated Oct 01, 2026
node-forge RSA PKCS#1 v1.5 signature verification accepts extra nested DigestAlgorithm elements
Source severity: HIGH / 8.7
| Ecosystem | Package | Affected range | First patched |
|---|---|---|---|
| npm | node-forge | Not supplied |
Original records & references
- NIST NVD record
- CVE Program record
- github.com — Reviewed advisory
PUBLISHED 2026-09-03T17:31:15-04:00
MODIFIED 2026-10-01T17:09:10-04:00
INGESTED 2026-10-06T11:45:17-04:00