CVE-2025-65200
Medium
Description
An issue was discovered in localstack 4.9.2 allowing attackers to execute arbitrary code via crafted content hosted on a web-accessable URL and when passed said URL in the the templateURL to the _localstack/cloudformation/deploy endpoint, the hosted content can get executed in the context of the docker container.
SeverityMedium
CVSS5.4
Exploit probability—
ProductLocalstack
PublishedOct 22, 2026
First seenOct 22, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| localstack | 4.9.2 | — |
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