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4 vulnerabilities found for node-opcua by node-opcua
CVE-2026-54156 (GCVE-0-2026-54156)
Vulnerability from nvd – Published: 2026-09-14 16:09 – Updated: 2026-09-14 16:35
VLAI
EPSS
VEX
Title
node-opcua: Unbounded nonce cache enables unauthenticated heap exhaustion DoS
Summary
node-opcua is an OPC UA implementation for TypeScript and Node.js. Prior to 2.166.0, the process-global g_alreadyUsedNonce cache used by nonceAlreadyBeenUsed in packages/node-opcua-secure-channel/source/server/server_secure_channel_layer.ts records nonces from OpenSecureChannelRequest and CreateSession without expiration or a size limit. An unauthenticated remote attacker can repeatedly create sessions with unique nonces, causing entries to persist after session expiry and accumulate across connection cycles even when maxSessions=10 limits concurrent sessions. The resulting unbounded heap growth can exhaust the default Node.js heap and crash the node-opcua server process. This issue is fixed in version 2.166.0.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 16:35 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/node-opcua/node-opcua/security… | x_refsource_CONFIRM |
| https://github.com/node-opcua/node-opcua/commit/b… | x_refsource_MISC |
| https://github.com/node-opcua/node-opcua/releases… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| node-opcua | node-opcua |
Affected:
< 2.166.0
|
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CVE-2026-54155 (GCVE-0-2026-54155)
Vulnerability from nvd – Published: 2026-09-14 16:07 – Updated: 2026-09-14 16:39
VLAI
EPSS
VEX
Title
node-opcua: Missing nonce verification in UserNameIdentityToken authentication
Summary
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.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 16:39 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/node-opcua/node-opcua/security… | x_refsource_CONFIRM |
| https://github.com/node-opcua/node-opcua/commit/c… | x_refsource_MISC |
| https://github.com/node-opcua/node-opcua/releases… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| node-opcua | node-opcua |
Affected:
< 2.166.0
|
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CVE-2026-54156 (GCVE-0-2026-54156)
Vulnerability from cvelistv5 – Published: 2026-09-14 16:09 – Updated: 2026-09-14 16:35
VLAI
EPSS
VEX
Title
node-opcua: Unbounded nonce cache enables unauthenticated heap exhaustion DoS
Summary
node-opcua is an OPC UA implementation for TypeScript and Node.js. Prior to 2.166.0, the process-global g_alreadyUsedNonce cache used by nonceAlreadyBeenUsed in packages/node-opcua-secure-channel/source/server/server_secure_channel_layer.ts records nonces from OpenSecureChannelRequest and CreateSession without expiration or a size limit. An unauthenticated remote attacker can repeatedly create sessions with unique nonces, causing entries to persist after session expiry and accumulate across connection cycles even when maxSessions=10 limits concurrent sessions. The resulting unbounded heap growth can exhaust the default Node.js heap and crash the node-opcua server process. This issue is fixed in version 2.166.0.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 16:35 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/node-opcua/node-opcua/security… | x_refsource_CONFIRM |
| https://github.com/node-opcua/node-opcua/commit/b… | x_refsource_MISC |
| https://github.com/node-opcua/node-opcua/releases… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| node-opcua | node-opcua |
Affected:
< 2.166.0
|
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CVE-2026-54155 (GCVE-0-2026-54155)
Vulnerability from cvelistv5 – Published: 2026-09-14 16:07 – Updated: 2026-09-14 16:39
VLAI
EPSS
VEX
Title
node-opcua: Missing nonce verification in UserNameIdentityToken authentication
Summary
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.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 16:39 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/node-opcua/node-opcua/security… | x_refsource_CONFIRM |
| https://github.com/node-opcua/node-opcua/commit/c… | x_refsource_MISC |
| https://github.com/node-opcua/node-opcua/releases… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| node-opcua | node-opcua |
Affected:
< 2.166.0
|
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"cveId": "CVE-2026-54155",
"datePublished": "2026-09-14T16:07:50.461Z",
"dateReserved": "2026-06-11T21:15:33.872Z",
"dateUpdated": "2026-09-14T16:39:35.824Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}