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Vulnerability · Published Jul 23, 2026 · Assigned by VulDB

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

Medium 5.3

In plain English

A medium-severity OS command injection in serverless-localstack from localstack. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 69% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)1.2%top 31.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

VendorProductVersions
localstack serverless-localstack 1.01.11.21.31.4.0

Weakness: CWE-78, CWE-77 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References