{"items":[{"id":"NVI-00016435","kind":"vulnerability","title":"node-opcua missing nonce verification in UserNameIdentityToken authentication","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-mq36-523m-x7vv","CVE-2026-54155"],"plain_summary":"GitHub lists this reviewed advisory for node-opcua. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-57f86dc60b1e8696fedb3a47610e360c"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-08-20T18:36:02.000Z","value":"7.7 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-706d4861679017a307a96ded7f221c74"},{"kind":"CVSS","as_of":"2026-09-30T19:38:27.293Z","value":"7.7 HIGH (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-57f86dc60b1e8696fedb3a47610e360c"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-706d4861679017a307a96ded7f221c74","url":"https://github.com/advisories/GHSA-mq36-523m-x7vv","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-mq36-523m-x7vv","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T20:14:33.912Z"},{"id":"sr-57f86dc60b1e8696fedb3a47610e360c","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54155","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-54155","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-08T01:48:12.360Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-706d4861679017a307a96ded7f221c74"],"technology":"node-opcua","known_exclusions":[],"conditions_summary":"**Summary**\nA missing nonce verification in the UserNameIdentityToken authentication handler allows an unauthenticated remote attacker to forge a password token that extracts as an empty string, and to replay captured authentication tokens across sessions.\n\n**Affected versions:** <= 2.165.0\n**Tested version:** 2.165.0\n**CVSS Score:** 8.1 (High)\n**CVSS Vector:** CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L\n**CWE:** CWE-347 Improper Verification of Cryptographic Signature\n\n---\n\n**Root Cause**\n\nIn `packages/node-opcua-server/source/opcua_server.ts` at line 1886-1887, after RSA-OAEP decrypting the UserNameIdentityToken password blob, the server reads a 4-byte little-endian length field and extracts `buff[4 : 4+length]` as the password. It never verifies that the trailing bytes equal `session.nonce`.\n\nThis has two consequences:\n\n1. **Forged empty password:** An attacker who retrieves the server's public key via an unauthenticated `GetEndpoints` call can craft a token where the 4-byte length field equals `serverNonce.length` (32). The server computes `length = 32 - 32 = 0` and calls `isValidUser(username, \"\")`. Any account that accepts an empty password is compromised.\n\n2. **Unconditiona","public_affected_ranges":["<= 2.165.0"]}],"null_published_at":"2026-11-08T19:53:44.059Z","source_updated_at":"2026-08-20T18:36:02.000Z","source_disclosed_at":"2026-08-20T18:35:33.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-02T20:14:33.912Z"},{"id":"NVI-00016435","kind":"vulnerability","title":"node-opcua missing nonce verification in UserNameIdentityToken authentication","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-mq36-523m-x7vv","CVE-2026-54155"],"plain_summary":"GitHub lists this reviewed advisory for node-opcua. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-706d4861679017a307a96ded7f221c74"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-08-20T18:36:02.000Z","value":"7.7 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-706d4861679017a307a96ded7f221c74"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-706d4861679017a307a96ded7f221c74","url":"https://github.com/advisories/GHSA-mq36-523m-x7vv","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-mq36-523m-x7vv","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T20:14:33.912Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-706d4861679017a307a96ded7f221c74"],"technology":"node-opcua","known_exclusions":[],"conditions_summary":"**Summary**\nA missing nonce verification in the UserNameIdentityToken authentication handler allows an unauthenticated remote attacker to forge a password token that extracts as an empty string, and to replay captured authentication tokens across sessions.\n\n**Affected versions:** <= 2.165.0\n**Tested version:** 2.165.0\n**CVSS Score:** 8.1 (High)\n**CVSS Vector:** CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L\n**CWE:** CWE-347 Improper Verification of Cryptographic Signature\n\n---\n\n**Root Cause**\n\nIn `packages/node-opcua-server/source/opcua_server.ts` at line 1886-1887, after RSA-OAEP decrypting the UserNameIdentityToken password blob, the server reads a 4-byte little-endian length field and extracts `buff[4 : 4+length]` as the password. It never verifies that the trailing bytes equal `session.nonce`.\n\nThis has two consequences:\n\n1. **Forged empty password:** An attacker who retrieves the server's public key via an unauthenticated `GetEndpoints` call can craft a token where the 4-byte length field equals `serverNonce.length` (32). The server computes `length = 32 - 32 = 0` and calls `isValidUser(username, \"\")`. Any account that accepts an empty password is compromised.\n\n2. **Unconditiona","public_affected_ranges":["<= 2.165.0"]}],"null_published_at":"2026-11-04T10:04:27.944Z","source_updated_at":"2026-08-20T18:36:02.000Z","source_disclosed_at":"2026-08-20T18:35:33.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-02T20:14:33.912Z"}],"next_cursor":null,"snapshot_revision":"42594"}