PT-2026-62047 · Aws · Aws-Sdk-Rust

CVE-2026-15957 · Published 2026-07-21 · Updated 2026-07-21

NVD

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-15957

Affected Products

Aws-Sdk-Rust

References · 4

• https://github.com/awslabs/aws-sdk-rust/releases/tag/release-2026-06-02 · Patch
• https://aws.amazon.com/security/security-bulletins/2026-061-aws · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-15957 · Security Note
• https://github.com/smithy-lang/smithy-rs/security/advisories/GHSA-4f2p-7j38-4xrg · Note