Bug 2515232

Summary: CVE-2026-18140 vaultwarden: aws-smithy-json: Denial of Service via uncontrolled recursion with deeply nested JSON [fedora-all]
Product: [Fedora] Fedora Reporter: Ganesh <gnaik>
Component: vaultwardenAssignee: Jonathan Wright <jonathan>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: jonathan, rust-sig
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["8aebf0a4-e631-424e-a6ea-2c4cd11ea3be"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2509566    

Description Ganesh 2026-08-13 11:25:20 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.