SEPTEMBER 20, 2026
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Case File

CVE-2026-18140

HIGH · CVSS 7.5 EPSS 0.43% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-30 · Last synced 2026-08-29

CyberRota Analysis

AI-Generated

The aws-smithy-json runtime crate prior to version 0.62.7 is vulnerable to uncontrolled recursion, which can be exploited by remote unauthenticated users through a single small HTTP request containing deeply nested JSON. This vulnerability can lead to a denial of service by causing process aborts due to stack exhaustion. Organizations utilizing the smithy-rs code generator should prioritize upgrading to version 0.62.7 or later to mitigate this risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-18140
Severity
HIGH
CVSS
7.5
EPSS
0.43%

Original NVD 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.

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