{"id":"UBUNTU-CVE-2026-118781","details":"Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.1, the affected implementation used BigInteger.prototype.modInverse(), bnModInverse(), lib/jsbn.js, RSA public exponent e to process the relevant input or security decision. node-forge's bundled jsbn implementation entered an infinite loop when BigInteger.prototype.modInverse() received a negative value or modulus. An attacker who could control the RSA public exponent passed to key generation, or a direct modInverse() operand, could block the Node.js event loop at full CPU. Parsed DER, PEM, JWK, PKCS#12, X.509, and TLS values are unsigned and cannot trigger this issue. This issue is fixed in version 1.4.1.","modified":"2026-10-31T03:30:09.919614769Z","published":"2026-10-30T00:00:00Z","upstream":["CVE-2026-118781"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-118781"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-118781"},{"type":"REPORT","url":"https://github.com/digitalbazaar/forge/commit/e96c47b7f006dec66fb7bb1934e7375498b04a72"},{"type":"REPORT","url":"https://github.com/digitalbazaar/forge/releases/tag/v1.4.1"},{"type":"REPORT","url":"https://github.com/digitalbazaar/forge/security/advisories/GHSA-h6cr-wjv9-3cpp"}],"affected":[{"package":{"name":"node-node-forge","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/node-node-forge?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.8.5~dfsg-2","0.9.1~dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-node-forge","binary_version":"0.9.1~dfsg-1"},{"binary_version":"0.9.1~dfsg-1","binary_name":"node-node-forge"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-118781.json"}},{"package":{"name":"node-node-forge","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/node-node-forge?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.0~dfsg-3","1.2.1~dfsg-2"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-node-forge","binary_version":"1.2.1~dfsg-2"},{"binary_name":"node-node-forge","binary_version":"1.2.1~dfsg-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-118781.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}