Uncontrolled Recursion Affecting axios package, versions <0.33.0>=1.0.0 <1.18.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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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Test your applications- Snyk IDSNYK-JS-AXIOS-18060730
- published21 Jul 2026
- disclosed20 Jul 2026
- creditfg0x0
Introduced: 20 Jul 2026
NewCVE-2026-67321 (opens in a new tab)How to fix?
Upgrade axios to version 0.33.0, 1.18.0 or higher.
Overview
axios is a promise-based HTTP client for the browser and Node.js.
Affected versions of this package are vulnerable to Uncontrolled Recursion in the defaultVisitor function of lib/helpers/toFormData.js, which calls JSON.stringify() on a value when its top-level key ends in {}, before the maxDepth guard can inspect the nested structure. An attacker can crash the process by supplying an object with a top-level key ending in {} and thousands of levels of nesting, which native JSON.stringify() recurses through until the call stack overflows with a RangeError. Exploitation requires the application to pass untrusted input through axios as data or params, with a top-level key ending in {} and nesting beyond roughly 2500 to 3000 levels.
Note: This is a bypass of the fix for the vulnerability described in CVE-2026-42039.