erezrokah / aws-testing-library / 21922211716

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chore(deps): update dependency axios to v1.13.5 [security] (#953)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [axios](https://axios-http.com)
([source](https://redirect.github.com/axios/axios)) | [`1.13.2` →
`1.13.5`](https://renovatebot.com/diffs/npm/axios/1.13.2/1.13.5) |
![age](https://developer.mend.io/api/mc/badges/age/npm/axios/1.13.5?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/axios/1.13.2/1.13.5?slim=true)
|

### GitHub Vulnerability Alerts

####
[CVE-2026-25639](https://redirect.github.com/axios/axios/security/advisories/GHSA-43fc-jf86-j433)

# Denial of Service via **proto** Key in mergeConfig

### Summary

The `mergeConfig` function in axios crashes with a TypeError when
processing configuration objects containing `__proto__` as an own
property. An attacker can trigger this by providing a malicious
configuration object created via `JSON.parse()`, causing complete denial
of service.

### Details

The vulnerability exists in `lib/core/mergeConfig.js` at lines 98-101:

```javascript
utils.forEach(Object.keys({ ...config1, ...config2 }), function computeConfigValue(prop) {
  const merge = mergeMap[prop] || mergeDeepProperties;
  const configValue = merge(config1[prop], config2[prop], prop);
  (utils.isUndefined(configValue) && merge !== mergeDirectKeys) || (config[prop] = configValue);
});
```

When `prop` is `'__proto__'`:

1. `JSON.parse('{"__proto__": {...}}')` creates an object with
`__proto__` as an own enumerable property
2. `Object.keys()` includes `'__proto__'` in the iteration
3. `mergeMap['__proto__']` performs prototype chain lookup, returning
`Object.prototype` (truthy object)
4. The expression `mergeMap[prop] || mergeDeepProperties` evaluates to
`Object.prototype`
5. `Object.prototype(...)` throws `TypeError: merge is not a function`

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