CVE-2026-7191
Received Received - Intake
Prototype Manipulation RCE in qnabot-on-aws Fulfillment Lambda

Publication date: 2026-04-27

Last updated on: 2026-04-27

Assigner: AMZN

Description
Improper use of the static-eval npm package in the open source solution qnabot-on-aws versions 7.2.4 and earlier may allow an authenticated administrator to execute arbitrary code within the fulfillment Lambda execution context by injecting a crafted conditional chaining expression via the Content Designer interface, which bypasses the intended expression sandbox through JavaScript prototype manipulation. This may grant direct access to backend resources (Lambda environment variables, OpenSearch indices, S3 objects, DynamoDB tables) that are not exposed through normal administrative interfaces. We recommend you upgrade to version 7.3.0 or above.
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Meta Information
Published
2026-04-27
Last Modified
2026-04-27
Generated
2026-06-16
AI Q&A
2026-04-28
EPSS Evaluated
2026-06-14
NVD
CVE-2026-7191
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
static-eval static-eval to 7.2.4 (exc)
qnabot-on-aws qnabot-on-aws From 7.3.0 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-94 The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
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Executive Summary

This vulnerability involves the improper use of the static-eval npm package in the open source solution qnabot-on-aws versions 7.2.4 and earlier. An authenticated administrator can exploit this by injecting a crafted conditional chaining expression through the Content Designer interface. This injection bypasses the intended expression sandbox using JavaScript prototype manipulation, allowing the attacker to execute arbitrary code within the fulfillment Lambda execution context.

Impact Analysis

The vulnerability can have severe impacts as it may grant direct access to backend resources that are normally not exposed through administrative interfaces. These resources include Lambda environment variables, OpenSearch indices, S3 objects, and DynamoDB tables. Exploiting this vulnerability allows an attacker to execute arbitrary code, potentially leading to data breaches, unauthorized data manipulation, or disruption of services.

Mitigation Strategies

To mitigate this vulnerability, it is recommended to upgrade qnabot-on-aws to version 7.3.0 or above.

Compliance Impact

This vulnerability allows an authenticated administrator to execute arbitrary code within the fulfillment Lambda execution context, potentially granting direct access to backend resources such as Lambda environment variables, OpenSearch indices, S3 objects, and DynamoDB tables that are not normally exposed.

Such unauthorized access to sensitive backend resources could lead to exposure or manipulation of personal or protected data, which may impact compliance with data protection standards and regulations like GDPR and HIPAA.

However, specific impacts on compliance depend on the nature of the data stored and how the affected system is used within an organization's environment.

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