---
title: "aws-smithy-json — CVE-2026-18140"
description: "An unsafe deserialisation flaw affects the crates.io package aws-smithy-json. Affected versions: <= 0.62.6. Fixed from version 0.62.7. CVSS score 7.5."
canonical: https://inyourgeek.com/en/failles-de-securite/2026-10-02-cve-2026-18140
type: faille-de-securite
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2026-10-02
dateModified: 2026-10-02
---
# aws-smithy-json — CVE-2026-18140

An unsafe deserialisation flaw affects the crates.io package aws-smithy-json. Affected versions: <= 0.62.6. Fixed from version 0.62.7. CVSS score 7.5.

## What to do

Update aws-smithy-json to 0.62.7 or later.

| Fact | Value |
| --- | --- |
| Package | aws-smithy-json |
| Ecosystem | crates.io (Rust) |
| Class | Unsafe deserialisation |
| Affected versions | <= 0.62.6 |
| Fixed version | 0.62.7 |
| CVSS | 7.5 |
| CVE | CVE-2026-18140 |
| GHSA | GHSA-8ffr-xgwf-xj56 |
| Published on | October 2, 2026 |
| Severity | High |

## Sources

- [GitHub Security Advisory — GHSA-8ffr-xgwf-xj56](https://github.com/advisories/GHSA-8ffr-xgwf-xj56) — GitHub Security Advisories
- [NVD — CVE-2026-18140](https://nvd.nist.gov/vuln/detail/CVE-2026-18140) — NVD

---

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