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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.

PUBLISHED Reserved 2026-04-27 | Published 2026-04-27 | Updated 2026-04-28 | Assigner AMZN




HIGH: 7.2CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

HIGH: 8.6CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-94: Improper Control of Generation of Code ('Code Injection')

Product status

Default status
unaffected

Any version
affected

Credits

Endor Labs finder

References

github.com/aws-solutions/qnabot-on-aws/releases/tag/v7.3.0 patch

aws.amazon.com/security/security-bulletins/2026-020-aws/ vendor-advisory

cve.org (CVE-2026-7191)

nvd.nist.gov (CVE-2026-7191)

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