EUVD-2026-50058
GHSA-vhqp-r6hx-7vw5
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessObtain local system access
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DeliveryCraft malicious configuration input
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ExploitSubmit input to configuration normalization API
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ExecutionPollute global object prototype
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ImpactAlter application integrity or disclose information.
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V3 - Web Frontend Security Prototype pollution prevention
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Local access to the machine running the Instana Agent is required. There are no additional authentication or configuration prerequisites-the vulnerability exists in the core normalization API and can be triggered once local access is obtained. |
| Impact | CVSS 3.1 vector AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L indicates a local attack vector requiring no privileges or user interaction. This limits exploitation to scenarios where an attacker has local system access. No EPSS data is available, so exploitation probability cannot be quantified. The vulnerability is not listed in CISA KEV and no public exploit has been identified. The local nature and absence of known exploitation reduce immediate urgency, though prototype pollution can have severe implications if the agent runs on shared or multi-tenant systems. |
| Exploit ScenarioDerived | A local attacker gains access to the system running the Instana Agent and crafts a malicious configuration payload. When the payload is processed through the configuration normalization API, it pollutes the prototype, potentially altering application logic, leaking secrets, or causing denial of service. |
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Alert meAnalysisAIv1 – Jul 29, 2026
Prototype pollution in the @instana/core Node.js tracer, part of IBM Observability with Instana Agent builds 1.0.303 to 1.0.320, allows a local attacker to inject arbitrary properties into JavaScript object prototypes. This can lead to information disclosure and high integrity impact. No public exploit or active exploitation reported; vendor patch is available.
RemediationAI
Apply the vendor-released patch by upgrading the Instana Agent to a fixed version. The advisory at https://www.ibm.com/support/pages/node/7281349 provides the exact fixed version. If immediate patching is not possible, restrict local access to the agent host and monitor for abnormal Node.js behavior, though this does not fully mitigate the prototype pollution risk.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
The vulnerability is a prototype pollution flaw (CWE-1321) in the configuration normalization API of the @instana/core Node.js tracer component, version 6.2.1. By manipulating input to this API, an attacker can pollute the fundamental object prototypes within the Node.js runtime, affecting all objects that inherit from them. The affected product is IBM Observability with Instana Agent, identified by CPE cpe:2.3:a:ibm:observability_with_instana_(agent):*.
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Severity by source
AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
Local vector, no privileges required, high integrity impact typical of prototype pollution.
Primary rating from Vendor (ibm).
CVSS VectorVendor: ibm
DescriptionCVE.org
IBM Observability with Instana (Agent) Build 1.0.303 through 1.0.320 IBM Instana Node.js tracer component @instana/core version 6.2.1 is vulnerable to prototype pollution through its configuration normalization API.
Articles & Coverage 2
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
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