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

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...

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...

GHSA-6WVW-VRW4-363W node-opcua: Unbounded nonce cache enables unauthenticated heap exhaustion DoS

Summary A process-global nonce cache with no eviction policy allows an unauthenticated remote attacker to exhaust server heap memory by repeatedly opening sessions, causing the node-opcua server process to crash. Affected versions: = 2.165.0 Tested version: 2.165.0 CVSS Score: 7.5 High CVSS Vecto...

NPM: node-opcua: Unbounded nonce cache enables unauthenticated heap exhaustion DoS

NPM: node-opcua: Unbounded nonce cache enables unauthenticated heap exhaustion DoS vulnerability discovered by ? in WordPress Npm node-opcua versions 2.166.0...

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

Summary A process-global nonce cache with no eviction policy allows an unauthenticated remote attacker to exhaust server heap memory by repeatedly opening sessions, causing the node-opcua server process to crash. Affected versions: = 2.165.0 Tested version: 2.165.0 CVSS Score: 7.5 High CVSS Vecto...

PT-2026-80239

Summary A process-global nonce cache with no eviction policy allows an unauthenticated remote attacker to exhaust server heap memory by repeatedly opening sessions, causing the node-opcua server process to crash. Affected versions: = 2.165.0 Tested version: 2.165.0 CVSS Score: 7.5 High CVSS Vecto...

PT-2026-80741

Summary A process-global nonce cache with no eviction policy allows an unauthenticated remote attacker to exhaust server heap memory by repeatedly opening sessions, causing the node-opcua server process to crash. Affected versions: = 2.165.0 Tested version: 2.165.0 CVSS Score: 7.5 High CVSS Vecto...

Replay Attack

Overview Affected versions of this package are vulnerable to Replay Attack in the signed-poll process due to the nonce cache being stored in-memory and limited in size. An attacker can obtain unauthorized access to a freshly-minted enrollment token by replaying a previously captured signed-poll...

Replay Attack

Overview Affected versions of this package are vulnerable to Replay Attack in the signed-poll process due to the nonce cache being stored in-memory and limited in size. An attacker can obtain unauthorized access to a freshly-minted enrollment token by replaying a previously captured signed-poll...

Replay Attack

Overview Affected versions of this package are vulnerable to Replay Attack in the signed-poll process due to the nonce cache being stored in-memory and limited in size. An attacker can obtain unauthorized access to a freshly-minted enrollment token by replaying a previously captured signed-poll...

Replay Attack

Overview Affected versions of this package are vulnerable to Replay Attack in the signed-poll process due to the nonce cache being stored in-memory and limited in size. An attacker can obtain unauthorized access to a freshly-minted enrollment token by replaying a previously captured signed-poll...

PT-2026-56108

internal/api/pop/nonce.go:25,40,86 + internal/api/server.go:38 — the signed-poll nonce cache is an in-process LRU sized at 65,536 entries. internal/api/updates.go:31 sets pollClockSkew = 5 time.Minute as the replay window. Affected All released versions through v0.3.0 that have shipped the ADR 00...

CVE-2026-12205 Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to private-key recovery

Crypt::DSA versions before 1.21 for Perl reused the nonce across signatures, leading to private-key recovery. Crypt::DSA::sign caches the per-signature nonce material in the Key object without ever clearing it. The first sign on a Key object picks a nonce, and every later sign on that same object...