CVE-2026-16763

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory (severity: LOW) published 2026-07-24. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this weekElevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.3Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
50%
KEV
Not listed

Published

July 23, 2026

Last Modified

July 24, 2026

Advisory Details (2)

Auto-updated Jul 24, 2026
No patch confirmed yet.
generic

Command injection via unsanitized `custom.localstack.docker.compose_file` · Issue #303 · localstack/serverless-localstack · GitHub

https://github.com/localstack/serverless-localstack/issues/303
generic

GitHub - localstack/serverless-localstack: ⚡ Serverless plugin for running against LocalStack · GitHub

https://github.com/localstack/serverless-localstack/

Vendor Advisories for CVE-2026-16763(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 17× in last 7d / 17× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-28 07:50 UTCEG score recompute
  2. 2026-07-28 07:50 UTCGHSA enrichment
  3. 2026-07-27 14:13 UTCEPSS rescore
  4. 2026-07-27 05:29 UTCEG score recompute
  5. 2026-07-27 05:29 UTCGHSA enrichment
  6. 2026-07-26 14:54 UTCEPSS rescore
  7. 2026-07-26 14:54 UTCEPSS rescore
  8. 2026-07-26 03:06 UTCEG score recompute
  9. 2026-07-26 03:06 UTCGHSA enrichment
  10. 2026-07-25 14:17 UTCEPSS rescore
  11. 2026-07-25 14:17 UTCEPSS rescore
  12. 2026-07-24 14:31 UTCNVD updateCVSS v4 → 1.9
  13. 2026-07-24 14:17 UTCEPSS rescore
  14. 2026-07-24 13:51 UTCMITRE cvelistV5CVSS v4 → 4.8
  15. 2026-07-23 22:23 UTCNVD updateCVSS v4 → 1.9
  16. 2026-07-23 21:38 UTCEG score recompute
  17. 2026-07-23 21:36 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-16763?
CVE-2026-16763 is a medium vulnerability published on July 23, 2026. 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…
When was CVE-2026-16763 disclosed?
CVE-2026-16763 was first published in the National Vulnerability Database on July 23, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16763 actively exploited?
CVE-2026-16763 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 50.5% of all scored CVEs.
What is the CVSS score of CVE-2026-16763?
CVE-2026-16763 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-16763?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16763, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-16763

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