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CVE-2026-15957

HIGH
7.5
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2026-15957
State
PUBLISHED
Assigner
AMZN
Reserved
2026-07-16 13:52 UTC
Published
2026-07-21 19:33 UTC
Last updated
2026-07-22 18:25 UTC
Primary CWE
CWE-770
CWE-770 Allocation of resources without limits or throttling
Vendor / Product
AWS / aws-sdk-rust
Sources
cve.org  ·  NVD

Severity & Metrics

7.5 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
AWS aws-sdk-rust — 0 < release-2026-06-02
Weakness (CWE)
CWESourceDescription
CWE-770 cna CWE-770 Allocation of resources without limits or throttling
CVSS scores (2)
ScoreSeverityVersionSourceVector
8.7 HIGH 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References (3)
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