Bug 2509566 (CVE-2026-18140) - CVE-2026-18140 aws-smithy-json: aws-smithy-json: Denial of Service via uncontrolled recursion with deeply nested JSON
Summary: CVE-2026-18140 aws-smithy-json: aws-smithy-json: Denial of Service via uncont...
Keywords:
Status: NEW
Alias: CVE-2026-18140
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2515232 2515233 2515234
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-30 19:02 UTC by OSIDB Bzimport
Modified: 2026-08-19 16:09 UTC (History)
15 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-07-30 19:02:21 UTC 
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.
Note You need to log in before you can comment on or make changes to this bug.