High 7.5Published Sep 3, 2026

CVE-2026-85393node-forge through 1.4.0 RSA PKCS#1 v1.5 Signature Forgery via Nested DigestAlgorithm Padding

Updated under an hour ago (2026-10-19 07:10 UTC)

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It affects digitalbazaar forge. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness (CWE): CWE-347
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Sep 3, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

digitalbazaar forge digitalbazaar:forge (from the name)	through 1.4.0	CNA record

References

https://github.com/digitalbazaar/forge/issues/1149issue-tracking
https://github.com/digitalbazaar/forgeproduct
https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/rsa.jstechnical-description
https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/asn1.jstechnical-description
https://github.com/advisories/GHSA-ppp5-5v6c-4jwprelated
https://www.vulncheck.com/advisories/node-forge-through-1.4.0-rsa-pkcs-1-1.5-signature-forgery-via-nested-digestalgorithm-paddingthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.