CVE-2026-15957 Affecting amazon-efs-utils package, versions <0:3.1.3-1.amzn2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-AMZN2-AMAZONEFSUTILS-21801033
- published29 Oct 2026
- disclosed21 Jul 2026
Introduced: 21 Jul 2026
CVE-2026-15957 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2 amazon-efs-utils to version 0:3.1.3-1.amzn2 or higher.
This issue was patched in ALAS2-2026-4044.
NVD Description
Note: Versions mentioned in the description apply only to the upstream amazon-efs-utils package and not the amazon-efs-utils package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
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.