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.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://aws.amazon.com/security/security-bulletins/2026-067-aws/ Vendor Advisory
- https://github.com/smithy-lang/smithy-rs/security/advisories/GHSA-8ffr-xgwf-xj56 Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.7 · amazonNVD modified 2026-10-23 22:10
Affected (CPE criteria) 1
cpe:2.3:a:amazon:aws-smithy-json:*:*:*:*:*:rust:*:*