CVE-2026-7191

HIGH 7.2

Arbitrary Code Execution via Sandbox Bypass in the open source solution QnABot on AWS

CVSS Score

7.2

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-94
Vendor	aws
Product	qnabot on aws
Published	Apr 27, 2026
Last Updated	Apr 27, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

AWS / QnABot on AWS

0 ≤ 7.2.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/aws-solutions/qnabot-on-aws/releases/tag/v7.3.0 aws.amazon.com: https://aws.amazon.com/security/security-bulletins/2026-020-aws/

Credits

Endor Labs