CVE Catalog

CVE-2026-18140

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.44%

36th percentile - higher than 36% of all known CVEs

Summary

The aws-smithy-json crate before version 0.62.7 contains an uncontrolled recursion vulnerability in the unknown-key skip path. A remote unauthenticated attacker can send a single small HTTP request with deeply nested JSON, causing stack exhaustion and process abort on a smithy-rs generated server.

Risk Assessment

Risk of server denial of service through a simple attack, potentially impacting service availability.

Recommendation

Update aws-smithy-json to version 0.62.7 or later and rebuild the server.

Related vulnerabilities

Original NVD description (English source)

Uncontrolled recursion in the unknown-key skip path of the aws-smithy-json runtime crate before 0.62.7, which the smithy-rs code generator invokes from every generated struct deserializer, might allow remote unauthenticated users to cause a denial of service (process abort via stack exhaustion) via a single small HTTP request containing deeply nested JSON to a smithy-rs generated server. To remediate this issue, users should upgrade to aws-smithy-json 0.62.7 or later and rebuild.

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