{"id":"CVE-2026-54155","revision":"24286a386c0241e68567d42e1e5be5a3","records":[{"revision":"24286a386c0241e68567d42e1e5be5a3","observedAt":"2026-10-25T13:17:22.268+00:00","statement":{"source":"nvd","id":"CVE-2026-54155","aliases":[],"title":"node-opcua is an OPC UA implementation for TypeScript and Node.js. Prior to 2.166.0, the UserNameIdentityToken authentication handler in packages/node-opcua-server/source/opcua_server.ts decrypts an RSA-OAEP password blob but does not verif…","description":"node-opcua is an OPC UA implementation for TypeScript and Node.js. Prior to 2.166.0, the UserNameIdentityToken authentication handler in packages/node-opcua-server/source/opcua_server.ts decrypts an RSA-OAEP password blob but does not verify that the trailing bytes match the current session serverNonce. An unauthenticated remote attacker can obtain the server public key through GetEndpoints and forge a blob whose little-endian length produces an empty password passed to isValidUser, compromising accounts that accept an empty password. Missing nonce binding also allows a captured UserNameIdentityToken ciphertext to be replayed in another session, and SecurityMode=None removes the separate client-signature safeguard. This issue is fixed in version 2.166.0.","state":0,"publishedAt":"2026-09-14T17:17:46.737+00:00","modifiedAt":"2026-09-30T19:38:27.293+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","score":7.7,"severity":"HIGH"}],"references":["https://github.com/node-opcua/node-opcua/commit/c6b05738682f5c8d70b1ea275c881f01a1cd9787","https://github.com/node-opcua/node-opcua/releases/tag/v2.166.0","https://github.com/node-opcua/node-opcua/security/advisories/GHSA-mq36-523m-x7vv"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-54155","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Awaiting Analysis","weaknesses":["CWE-347"],"productCriteria":[],"sourceDates":{"published":"2026-09-14T17:17:46.737","lastModified":"2026-09-30T19:38:27.293"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-54155","identifiers":["CVE-2026-54155"]},"retained":false,"historicalAffected":[]}],"coverage":[]}