CVE-2026-15957
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Smithy-RS is a Rust code generation and runtime framework that generates HTTP clients and servers from Smithy interface definitions, powering the AWS SDK for Rust and custom service implementations.
Uncontrolled recursion in the JSON, CBOR, and XML deserializer functions emitted by Amazon smithy-rs code generation could allow remote attackers to cause a denial of service (process abort via stack exhaustion) via a small request containing deeply nested data for a recursive model shape to a generated SDK or server.
To mitigate this issue, users should upgrade to aws-sdk-rust release-2026-06-02 or later. Users building custom servers with smithy-rs codegen should regenerate from smithy-rs release-2026-06-01 or later.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| AWS | aws-sdk-rust | 0 < release-2026-06-02 | affected |
Weaknesses
- CWE-770: CWE-770 Allocation of resources without limits or throttling
References
- https://github.com/awslabs/aws-sdk-rust/releases/tag/release-2026-06-02
- https://aws.amazon.com/security/security-bulletins/2026-061-aws/
- https://github.com/smithy-lang/smithy-rs/security/advisories/GHSA-4f2p-7j38-4xrg
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.