CVE-2026-15957

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-15957
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-15957.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-15957
Aliases
  • GHSA-4f2p-7j38-4xrg
Published
2026-07-21T19:33:55.409Z
Modified
2026-07-24T03:57:07.166117787Z
Severity
  • 8.7 (High) CVSS_V4 - 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 CVSS Calculator
Summary
Uncontrolled recursion in smithy-rs generated JSON, CBOR, and XML deserializers allows unauthenticated remote denial of service via recursive shapes
Details

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.

Database specific 
{
    "cwe_ids": [
        "CWE-770"
    ],
    "cna_assigner": "AMZN",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15957.json"
}
References

Affected packages

Git / github.com/awslabs/aws-sdk-rust

Affected ranges

Type
GIT
Repo
https://github.com/awslabs/aws-sdk-rust
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
4926e3bd41e42921c9fa9c6314056cfc59a3f02d
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "release-2026-06-02"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

Other
release-2022-07-21
release-2022-08-08
release-2022-08-31
release-2022-09-21
release-2022-10-13
release-2022-10-26
release-2022-12-14
release-2022-12-15
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v0.*
v0.0.10-alpha
v0.0.11-alpha
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Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-15957.json"