RCE in Localstack Serverless-localstack
CVE-2026-16763
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…
Vulnerability class: Command Injection (OS Command Injection)
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Localstack Serverless-localstack — versions 1.0, 1.1, 1.2
Weakness classification (CWE)
References
- cna@vuldb.com (technical-description, vdb-entry)
- cna@vuldb.com (signature, permissions-required)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (issue-tracking, exploit)
- cna@vuldb.com (product)
Frequently asked questions
- What is CVE-2026-16763?
- CVE-2026-16763 is a medium-severity vulnerability in Localstack Serverless-localstack, classified under Command Injection. CVSS score: 5.3/10. Published 2026-07-23.
- How severe is CVE-2026-16763?
- Medium severity. CVSS v3 base score is 5.3 out of 10.