{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54155","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-11T21:15:33.872Z","datePublished":"2026-09-14T16:07:50.461Z","dateUpdated":"2026-09-14T16:39:35.824Z"},"containers":{"cna":{"title":"node-opcua: Missing nonce verification in UserNameIdentityToken authentication","problemTypes":[{"descriptions":[{"cweId":"CWE-347","lang":"en","description":"CWE-347: Improper Verification of Cryptographic Signature","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","version":"3.1"}}],"references":[{"name":"https://github.com/node-opcua/node-opcua/security/advisories/GHSA-mq36-523m-x7vv","tags":["x_refsource_CONFIRM"],"url":"https://github.com/node-opcua/node-opcua/security/advisories/GHSA-mq36-523m-x7vv"},{"name":"https://github.com/node-opcua/node-opcua/commit/c6b05738682f5c8d70b1ea275c881f01a1cd9787","tags":["x_refsource_MISC"],"url":"https://github.com/node-opcua/node-opcua/commit/c6b05738682f5c8d70b1ea275c881f01a1cd9787"},{"name":"https://github.com/node-opcua/node-opcua/releases/tag/v2.166.0","tags":["x_refsource_MISC"],"url":"https://github.com/node-opcua/node-opcua/releases/tag/v2.166.0"}],"affected":[{"vendor":"node-opcua","product":"node-opcua","versions":[{"version":"< 2.166.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-14T16:07:50.461Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-mq36-523m-x7vv","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-14T16:39:00.556555Z","id":"CVE-2026-54155","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-14T16:39:35.824Z"}}]}}