CVE-2026-16763 MEDIUM

CVE-2026-16763: localstack serverless-localstack Configuration index.js os command injection

Vendor Localstack
Product serverless-localstack
Weakness CWE-78
Published July 23, 2026
Last update July 24, 2026

CVSS base score

4.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

July 23, 2026 CVE published
July 24, 2026 Record updated