CVE-2026-18140

7.5 HIGH
Published: July 30, 2026 Modified: July 30, 2026
View on 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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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://aws.amazon.com/security/security-bulletins/2026-067-aws/
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5
https://crates.io/crates/aws-smithy-json/0.62.7
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5

3 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)