# CVE-2026-18140: goose: Uncontrolled recursion in the unknown-key skip path of the aws-smithy-json runtime crate before 0.62.7, which the smi...

CVE-2026-18140 is fixed in goose on 1 platform, first by RHSA-2026:67593, released July 30, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-18140
- Priority: High
- CVSS: 7.5 (important)
- EPSS: 0.0078
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 30, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | goose RHEL 10 | 1.38.0-1.el10_2 | [RHSA-2026:67593](https://patchblox.com/security/data/fix/linux/rhsa-2026-67593.md) | Jul 30, 2026 |
| Linux | goose RHEL 9 | 0:1.38.0-1.el9_8 | [RHSA-2026:67595](https://patchblox.com/security/data/fix/linux/rhsa-2026-67595.md) | Sep 19, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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