CVE-2026-18140— Uncontrolled recursion in the aws-smithy-json unknown-key skip path allows unauthenticated remote denial of service in smithy-rs generated servers
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| AWS | aws-smithy-json | 0.32.0≤ 0.62.6 | affected |
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I. Basic Information for CVE-2026-18140
Vulnerability Information
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Vulnerability Title
Uncontrolled recursion in the aws-smithy-json unknown-key skip path allows unauthenticated remote denial of service in smithy-rs generated servers
Source: CVE Program / CVE List V5
Vulnerability Description
Uncontrolled recursion in the unknown-key skip path of the aws-smithy-json runtime crate before 0.62.7, which the smithy-rs code generator invokes from every generated struct deserializer, might allow remote unauthenticated users to cause a denial of service (process abort via stack exhaustion) via a single small HTTP request containing deeply nested JSON to a smithy-rs generated server. To remediate this issue, users should upgrade to aws-smithy-json 0.62.7 or later and rebuild.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
Source: CVE Program / CVE List V5
Vulnerability Title
AWS aws-smithy-json 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
AWS aws-smithy-json是AWS公司开源的一个JSON数据处理框架。 AWS aws-smithy-json 0.62.7之前版本存在资源管理错误漏洞，该漏洞源于未知键跳过路径中的未受控递归，可能导致远程未认证用户通过单个包含深度嵌套JSON的小型HTTP请求造成拒绝服务（进程因栈耗尽而中止）。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| AWS | aws-smithy-json | 0.32.0 ~ 0.62.6 | - |
II. Public POCs for CVE-2026-18140
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 10762 chars
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III. Intelligence Information for CVE-2026-18140
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Vendor Advisories for CVE-2026-18140 (2)
IV. Related Vulnerabilities
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V. Comments for CVE-2026-18140
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