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.

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Solution

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History

Fri, 04 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1284
References
Metrics threat_severity

None

threat_severity

Important


Thu, 03 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 03 Sep 2026 19:00:00 +0000

Type Values Removed Values Added
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.
Title node-forge through 1.4.0 RSA PKCS#1 v1.5 Signature Forgery via Nested DigestAlgorithm Padding
First Time appeared Digitalbazaar
Digitalbazaar forge
Weaknesses CWE-347
CPEs cpe:2.3:a:digitalbazaar:forge:*:*:*:*:*:*:*:*
Vendors & Products Digitalbazaar
Digitalbazaar forge
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-03T19:14:06.547Z

Reserved: 2026-09-03T18:10:52.622Z

Link: CVE-2026-85393

cve-icon Vulnrichment

Updated: 2026-09-03T19:14:03.413Z

cve-icon NVD

Status : Received

Published: 2026-09-03T19:17:31.103

Modified: 2026-09-03T20:17:28.747

Link: CVE-2026-85393

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-03T18:54:25Z

Links: CVE-2026-85393 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-03T21:30:06Z

Weaknesses