High severity7.5NVD Advisory· Published Sep 3, 2026· Updated Sep 24, 2026
CVE-2026-85393
CVE-2026-85393
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
node-forgenpm | <= 1.4.0 | — |
Affected products
2- Range: <=1.4.0
Patches
Vulnerability mechanics
References
8- github.com/advisories/GHSA-86w9-cpqp-85rvghsaADVISORY
- github.com/advisories/GHSA-ppp5-5v6c-4jwpnvdADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-85393ghsaADVISORY
- github.com/digitalbazaar/forge/blob/v1.4.0/lib/asn1.jsnvdWEB
- github.com/digitalbazaar/forge/blob/v1.4.0/lib/rsa.jsnvdWEB
- github.com/digitalbazaar/forge/issues/1149nvdWEB
- github.com/digitalbazaar/forge/pull/1152ghsaWEB
- www.vulncheck.com/advisories/node-forge-through-1.4.0-rsa-pkcs-1-1.5-signature-forgery-via-nested-digestalgorithm-paddingnvdWEB
News mentions
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