Uncontrolled Recursion Affecting aws-smithy-json package, versions <0.62.7
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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- published2 Aug 2026
- disclosed30 Jul 2026
- creditUnknown
Introduced: 30 Jul 2026
NewCVE-2026-18140 (opens in a new tab)How to fix?
Upgrade aws-smithy-json to version 0.62.7 or higher.
Overview
Affected versions of this package are vulnerable to Uncontrolled Recursion via the unknown-key skip process. An attacker can cause the server to exhaust its stack and abort by sending a single HTTP request with deeply nested JSON data.