EUVD-2026-80867Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
AV:N as poisoned events arrive over the OPC UA network and AC:H because a specific app data-flow into fieldsToJson is required; I:L reflects Object.prototype logic corruption and A:L the DoS, with C:N since no data is disclosed.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
2DescriptionCVE.org
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/alarms_and_conditions/client_alarm.ts directly assigns unsanitized field names and allows a __proto__.pollutedKey path to modify Object.prototype. Successful exploitation requires an application to expose attacker-controlled event fields to fieldsToJson and may cause denial of service or application logic corruption. This vulnerability is fixed in 2.145.0.
AnalysisAI
Prototype pollution in node-opcua-client versions prior to 2.145.0 lets an attacker who controls OPC UA event or condition field names corrupt Object.prototype through the internal fieldsToJson helper in packages/node-opcua-client/source/alarms_and_conditions/client_alarm.ts, which assigns unsanitized field names and permits a __proto__.pollutedKey assignment path. Only host applications that feed attacker-controlled event field names into that serialization helper are exposed; a malicious or compromised OPC UA server (or untrusted publisher) must supply the crafted field name AND the application must omit field-name sanitization, which is why the vendor rates attack complexity as high. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the host application built on node-opcua-client (< 2.145.0) to pass attacker-controlled OPC UA event/condition field names into the internal fieldsToJson method in packages/node-opcua-client/source/alarms_and_conditions/client_alarm.ts, where a field named to include a __proto__ path is assigned without sanitization. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuinely low-priority issue despite being a real prototype-pollution flaw. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patch: upgrade node-opcua / node-opcua-client to 2.145.0 or later per advisory GHSA-cv5q-7543-48q4 (https://github.com/node-opcua/node-opcua/security/advisories/GHSA-cv5q-7543-48q4); because the vulnerable code is transitive, update lockfiles and re-run dependency resolution rather than relying on a top-level version bump alone. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
A vulnerability in the NuPoint Unified Messaging (NPM) component of Mitel MiCollab through 9.8 SP1 FP2 (9.8.1.201) could
FortiOS and FortiProxy contain an authentication bypass via the Node.js websocket module allowing unauthenticated remote
Denial of service against HTTP/2 server implementations allows remote unauthenticated attackers to exhaust server resour
Eval injection vulnerability in the internals.batch function in lib/batch.js in the bassmaster plugin before 1.5.2 for t
Flowise version 3.0.5 contains a remote code execution vulnerability in the CustomMCP node. The mcpServerConfig paramete
Node.js 8.5.0 before 8.6.0 allows remote attackers to access unintended files, because a change to ".." handling was inc
An issue was discovered in the node-serialize package 0.0.4 for Node.js. Rated critical severity (CVSS 9.8), this vulner
OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly restrict processing of ChangeCiph
Directory traversal vulnerability in the st module before 0.2.5 for Node.js allows remote attackers to read arbitrary fi
Multiple SQL injection vulnerabilities in the Manage Accounts page in the AccountManagement.asmx service in the Solarwin
The JS-YAML module before 2.0.5 for Node.js parses input without properly considering the unsafe !!js/function tag, whic
The AES-NI implementation in OpenSSL before 1.0.1t and 1.0.2 before 1.0.2h does not consider memory allocation during a
Same technique Denial Of Service
View allShare
External POC / Exploit Code
Leaving vuln.today