CVE-2025-65200

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.

• localstack.comhttp://localstack.com
• cyberroute.github.iohttps://cyberroute.github.io/post/2025-12-11-localstack-hack/
• github.comhttps://github.com/localstack/localstack/blob/aba1ee84592d76f0a88dd286fcd83b65080e31ac/localstack-core/localstack/services/cloudformation/deploy_ui.py
• github.comhttps://github.com/localstack/localstack/pull/13293/

No related CVEs by CWE or product.