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CVE-2026-15957

8.7 high SSVC exploitation: none Awaiting Analysis
NVD · CVE.org

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

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 3

  1. StatusPublished → Awaiting AnalysisNVD modified 2026-10-24 19:10
  2. StatusAwaiting Analysis → PublishedNVD modified 2026-10-20 18:11
  3. First seenCVSS 8.7NVD modified 2026-10-20 19:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 3