Arbitrary Code Execution via Sandbox Bypass in the open source solution QnABot on AWS
Published Apr 27, 2026
8.6
HIGHCVSS 4.0
EPSS 0.74%
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.
Affected products
-
Affected
- ≥ 0, ≤ 7.2.4
Default status is the baseline for the product. Each version can override it (patched versions can be marked unaffected).
| Vendor | Product | Default status | Versions |
|---|---|---|---|
| AWS | QnABot on AWS | unaffected | Affected
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (3)
- https://aws.amazon.com/security/security-bulletins/2026-020-aws/ vendor-advisory
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-25921 Advisory
- https://github.com/aws-solutions/qnabot-on-aws/releases/tag/v7.3.0 patch
| Link | Providers | Tags |
|---|---|---|
| https://aws.amazon.com/security/security-bulletins/2026-020-aws/ | vendor-advisory | |
| https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-25921 | Advisory | |
| https://github.com/aws-solutions/qnabot-on-aws/releases/tag/v7.3.0 | patch |
Change history (0)
No recorded changes yet.
CVE.org / MITRE
CISA Vulnrichment
Red Hat
No data
GitHub
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