CVE-2026-85393
CVE-2026-85393 · node-forge through 1.4.0 RSA PKCS#1 v1.5 Signature Forgery via Nested DigestAlgorithm Padding
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 8.7 · High · EPSS 0.2%
- Published
- Updated
Stack: system
Affected products and versions
forge
- Versions
- ≥ 0, ≤ 1.4.0: Affected (semver)
No fix published
node-node-forge Ubuntu:20.04:LTS
- Versions
- 0.8.5~dfsg-2
- 0.9.1~dfsg-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
node-node-forge Ubuntu:22.04:LTS
- Versions
- 0.10.0~dfsg-3
- 1.2.1~dfsg-2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
Original sources
- https://github.com/digitalbazaar/forge/issues/1149
- https://github.com/digitalbazaar/forge
- https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/rsa.js
- https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/asn1.js
- https://github.com/advisories/GHSA-ppp5-5v6c-4jwp
- https://www.vulncheck.com/advisories/node-forge-through-1.4.0-rsa-pkcs-1-1.5-signature-forgery-via-nested-digestalgorithm-padding
- https://nvd.nist.gov/vuln/detail/CVE-2026-85393