CVE Catalog

CVE-2026-15957

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.42%

34th percentile - higher than 34% of all known CVEs

Summary

Uncontrolled recursion in 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.

Risk Assessment

Risk of service disruption by a remote unauthenticated attacker, potentially leading to application unavailability.

Recommendation

Upgrade aws-sdk-rust to release-2026-06-02 or later, or for custom servers regenerate from smithy-rs release-2026-06-01 or later.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS