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.
References
- www.cve.org/CVERecord ↗
- nvd.nist.gov/vuln/detail/CVE-2025-65200 ↗
- localstack.com/ ↗
- cyberroute.github.io/post/2025-12-11-localstack-hack/ ↗
- github.com/localstack/localstack/blob/aba1ee84592d76f0a88dd286fcd83b65080e31ac/localstack-core/localstack/services/cloudformation/deploy_ui.py ↗
- github.com/localstack/localstack/pull/13293/ ↗
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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.