A vulnerability was identified in localstack serverless-localstack up to 1.4.0. The affected element is an unknown function of the file src/index.js of the component Configuration Handler. The manipulation of the argument custom.localstack.docker.compose_file leads to os command injection.
An attack has to be approached locally. The exploit is publicly available and might be used. The project was informed of the problem early through an issue report but has not responded yet.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 6
https://github.com/localstack/serverless-localstack/
cna@vuldb.com
https://github.com/localstack/serverless-localstack/issues/303
cna@vuldb.com
https://vuldb.com/cve/CVE-2026-16763
cna@vuldb.com
https://vuldb.com/submit/861028
cna@vuldb.com
https://vuldb.com/vuln/382620
cna@vuldb.com
https://vuldb.com/vuln/382620/cti
cna@vuldb.com