CVE-2025-65200

critical · 9.6

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.

9.6

CVSS

0.6%

EPSS (exploit prob.)

46th

EPSS percentile

2026-10-22

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Weaknesses

CWE-79

References

http://localstack.com
https://cyberroute.github.io/post/2025-12-11-localstack-hack/
https://github.com/localstack/localstack/blob/aba1ee84592d76f0a88dd286fcd83b65080e31ac/localstack-core/localstack/services/cloudformation/deploy_ui.py
https://github.com/localstack/localstack/pull/13293/

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2025-65200