CVE-2026-14893 in Observability with Instana
Summary
by MITRE • 07/29/2026
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.
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Analysis
by VulDB Data Team • 07/29/2026
The vulnerability in IBM Observability with Instana Agent affects the Node.js tracer component @instana/core version 6.2.1 within build versions 1.0.303 through 1.0.320. This represents a critical prototype pollution flaw that stems from insecure configuration normalization practices within the system's API handling mechanisms. The vulnerability specifically targets the way the tracer component processes configuration parameters, allowing attackers to manipulate object prototypes through crafted input data.
Prototype pollution occurs when an application fails to properly sanitize user-supplied input before using it in object property assignments. In this case, the @instana/core module exposes a configuration normalization API that does not adequately validate or sanitize incoming data structures. When malicious input containing prototype-polluting properties reaches the normalization function, it can alter the behavior of core JavaScript objects and their prototypes. This vulnerability falls under CWE-1321 which specifically addresses prototype pollution issues in JavaScript applications.
The operational impact of this vulnerability is significant as it can lead to arbitrary code execution, denial of service conditions, or privilege escalation within the monitored environment. Attackers could exploit this flaw by injecting malicious configuration data that pollutes the Object.prototype or other core object prototypes, potentially affecting downstream processes and system stability. The vulnerability affects the entire monitoring infrastructure since the tracer component is responsible for collecting and processing telemetry data from applications.
Security implications extend beyond simple code execution as prototype pollution can enable various attack vectors including server-side request forgery, cross-site scripting, and information disclosure. When the polluted prototypes are used in subsequent API calls or data processing operations, they may cause unexpected behavior that attackers can leverage for further exploitation. This vulnerability aligns with ATT&CK technique T1059.007 which covers JavaScript-based execution methods.
Mitigation strategies should include immediate patching of affected versions to the latest stable releases where this prototype pollution issue has been addressed. Organizations should also implement strict input validation and sanitization for all configuration parameters, particularly those that may be exposed to external or untrusted sources. Additional protective measures include runtime monitoring for unusual prototype modifications, implementing proper access controls for configuration endpoints, and conducting thorough security testing of API normalization functions. The vulnerability highlights the importance of secure coding practices in JavaScript environments and demonstrates how seemingly benign configuration handling can become a critical security weakness when proper input validation is omitted.