CVE-2026-69200

CVE-2026-69200 is a prototype pollution vulnerability in the node-opcua library (an OPC UA implementation for TypeScript/Node.js). The flaw exists in the internal fieldsToJson() method within packages/node-opcua-client/source/alarms_and_conditions/client_alarm.ts, which directly assigns unsanitiz...

PT-2026-93840

Name of the Vulnerable Software and Affected Versions node-opcua-client versions prior to 2.145.0 Description The fieldsToJson function in the packages/node-opcua-client/source/alarms and conditions/client alarm.ts file directly assigns unsanitized field names. This allows a proto .pollutedKey pa...

PT-2026-93839

Name of the Vulnerable Software and Affected Versions node-opcua versions 2.0.0 through 2.169.0 Description A combination of bugs in the client implementation leads to unlimited TCP socket accumulation in the FIN-WAIT-2 state during automatic reconnection, resulting in memory exhaustion and proce...

CVE-2026-69200: Improperly Controlled Modification of Object Prototype Attributes

node-opcua is an OPC UA implementation for TypeScript and Node.js. Prior to node-opcua-client 2.145.0, the internal fieldsToJson method in packages/node-opcua-client/source/alarmsandconditions/clientalarm.ts directly assigns unsanitized field names and allows a proto.pollutedKey path to modify...

CVE-2026-68904: Uncontrolled Resource Consumption

node-opcua is an OPC UA implementation for TypeScript and Node.js. From 2.0.0 until 2.170.0, node-opcua clients using the default keepSessionAlive setting can enter a repeated reconnection cycle when an OPC UA server's clock skew causes BadInvalidTimestamp responses...

CVE-2026-54155

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/opcuaserver.ts decrypts an RSA-OAEP password blob but does not verify that the trailing bytes match the current session...

CVE-2026-54156

node-opcua is an OPC UA implementation for TypeScript and Node.js. Prior to 2.166.0, the process-global galreadyUsedNonce cache used by nonceAlreadyBeenUsed in packages/node-opcua-secure-channel/source/server/serversecurechannellayer.ts records nonces from OpenSecureChannelRequest and CreateSessi...

CVE-2026-54156 node-opcua: Unbounded nonce cache enables unauthenticated heap exhaustion DoS

node-opcua is an OPC UA implementation for TypeScript and Node.js. Prior to 2.166.0, the process-global galreadyUsedNonce cache used by nonceAlreadyBeenUsed in packages/node-opcua-secure-channel/source/server/serversecurechannellayer.ts records nonces from OpenSecureChannelRequest and CreateSessi...

CVE-2026-54156 node-opcua: Unbounded nonce cache enables unauthenticated heap exhaustion DoS

node-opcua is an OPC UA implementation for TypeScript and Node.js. Prior to 2.166.0, the process-global galreadyUsedNonce cache used by nonceAlreadyBeenUsed in packages/node-opcua-secure-channel/source/server/serversecurechannellayer.ts records nonces from OpenSecureChannelRequest and CreateSessi...

EUVD-2026-77624

node-opcua is an OPC UA implementation for TypeScript and Node.js. Prior to 2.166.0, the process-global galreadyUsedNonce cache used by nonceAlreadyBeenUsed in packages/node-opcua-secure-channel/source/server/serversecurechannellayer.ts records nonces from OpenSecureChannelRequest and CreateSessi...

CVE-2026-54156 node-opcua: Unbounded nonce cache enables unauthenticated heap exhaustion DoS

node-opcua is an OPC UA implementation for TypeScript and Node.js. Prior to 2.166.0, the process-global galreadyUsedNonce cache used by nonceAlreadyBeenUsed in packages/node-opcua-secure-channel/source/server/serversecurechannellayer.ts records nonces from OpenSecureChannelRequest and CreateSessi...

CVE-2026-54156

node-opcua (an OPC UA implementation for TypeScript/Node.js) versions >=2.1.9 through

EUVD-2026-77619

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/opcuaserver.ts decrypts an RSA-OAEP password blob but does not verify that the trailing bytes match the current session...

CVE-2026-54155 node-opcua: Missing nonce verification in UserNameIdentityToken authentication

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/opcuaserver.ts decrypts an RSA-OAEP password blob but does not verify that the trailing bytes match the current session...

CVE-2026-54155 node-opcua: Missing nonce verification in UserNameIdentityToken authentication

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/opcuaserver.ts decrypts an RSA-OAEP password blob but does not verify that the trailing bytes match the current session...

CVE-2026-54155 node-opcua: Missing nonce verification in UserNameIdentityToken authentication

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/opcuaserver.ts decrypts an RSA-OAEP password blob but does not verify that the trailing bytes match the current session...

CVE-2026-54155

node-opcua (NPM, versions ≤ 2.165.0) contains a missing nonce verification in the UserNameIdentityToken authentication handler (packages/node-opcua-server/source/opcua_server.ts). After RSA-OAEP decryption of the password blob, the server never checks that trailing bytes match session.nonce. This...

CVE-2026-54155: Improper Verification of Cryptographic Signature

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/opcuaserver.ts decrypts an RSA-OAEP password blob but does not verify that the trailing bytes match the current session...

CVE-2026-54156: Allocation of Resources Without Limits or Throttling

node-opcua is an OPC UA implementation for TypeScript and Node.js. Prior to 2.166.0, the process-global galreadyUsedNonce cache used by nonceAlreadyBeenUsed in packages/node-opcua-secure-channel/source/server/serversecurechannellayer.ts records nonces from OpenSecureChannelRequest and CreateSessi...

CVE-2026-75162: Exposure of Sensitive Information to an Unauthorized Actor

An information disclosure vulnerability in the opcua-configuration method of /cgi-bin/wwwugw.cgi in MBS-Solutions X-Serie Gateway firmware V60005 allows any remote authenticated user, including users with the low-privileged Standard role, to retrieve the configured OPC-UA authentication credentia...