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TI-2026-13952 Aliases CVE-2026-16763GHSA-64cc-4fc3-52m3

localstack serverless-localstack Configuration index.js os command injection

Priority MEDIUM 55CWE-77Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-77.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01224 68th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
localstackserverless-localstack1.0; 1.1; 1.2; 1.3; 1.4.0—No fix listedCNA
  • serverless-localstack Vendorlocalstack Affected 1.0; 1.1; 1.2; 1.3; 1.4.0 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:localstack:serverless-localstack:*:*:*:*:*:*:*:*——localstack
  • cpe:2.3:a:localstack:serverless-localstack:*:*:*:*:*:*:*:* Versions — — ·localstack

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-16763
  2. 2026-10-03 Alias added: GHSA-64cc-4fc3-52m3

References

Exploit 1

Other 1

  • TI-2021-12043 The dashboard component of StackLift LocalStack 0.12.6 allows attackers to inject… CVSS 3.1CRITICAL 9.8
  • TI-2023-26017 Missing SSL certificate validation in localstack v2.3.2 allows attackers to eavesdrop on… CVSS 3.1HIGH 7.4
  • TI-2021-12044 A Cross-site scripting (XSS) vulnerability exists in StackLift LocalStack 0.12.6. CVSS 3.1MEDIUM 6.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences