{"id":"CVE-2026-85393","title":"node-forge through 1.4.0 fails to validate element count in nested DigestAlgorithm sequences during RSA PKCS#1 v1.5 signature verification","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 f…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-347"],"published":"2026-09-03","updated":"2026-09-24","sourceUpdated":"2026-09-24T20:43:32.537","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-85393","references":[{"url":"https://github.com/advisories/GHSA-ppp5-5v6c-4jwp","label":"disclosure@vulncheck.com"},{"url":"https://github.com/digitalbazaar/forge","label":"disclosure@vulncheck.com"},{"url":"https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/asn1.js","label":"disclosure@vulncheck.com"},{"url":"https://github.com/digitalbazaar/forge/blob/v1.4.0/lib/rsa.js","label":"disclosure@vulncheck.com"},{"url":"https://github.com/digitalbazaar/forge/issues/1149","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/node-forge-through-1.4.0-rsa-pkcs-1-1.5-signature-forgery-via-nested-digestalgorithm-padding","label":"disclosure@vulncheck.com"},{"url":"https://github.com/advisories/GHSA-ppp5-5v6c-4jwp","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00326,"epssPercentile":0.22953,"ingestedAt":"2026-09-24T20:51:40.241Z","slug":"CVE-2026-85393","body":"## Overview\n\nnode-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}