CVE-2022-21190
CRITICAL9.8EPSS 0.67%Prototype Pollution in convict
Published: 5/14/2022Modified: 3/13/2026
Also known as:GHSA-jjf5-wx3j-3fv7
Description
This affects the package convict before 6.2.3. This is a bypass of [CVE-2022-22143](https://security.snyk.io/vuln/SNYK-JS-CONVICT-2340604). The [fix](https://github.com/mozilla/node-convict/commit/3b86be087d8f14681a9c889d45da7fe3ad9cd880) introduced, relies on the startsWith method and does not prevent the vulnerability: before splitting the path, it checks if it starts with __proto__ or this.constructor.prototype. To bypass this check it's possible to prepend the dangerous paths with any string value followed by a dot, like for example foo.__proto__ or foo.this.constructor.prototype.
Affected packages (1)
- npm/convictfrom 0, < 6.2.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
References (7)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2022-21190
- PATCHhttps://github.com/mozilla/node-convict
- WEBhttps://gist.github.com/dellalibera/cebce20e51410acebff1f46afdc89808
- WEBhttps://github.com/mozilla/node-convict/blob/3b86be087d8f14681a9c889d45da7fe3ad9cd880/packages/convict/src/main.js%23L571
- WEBhttps://github.com/mozilla/node-convict/blob/master/CHANGELOG.md%23623---2022-05-07
- WEBhttps://github.com/mozilla/node-convict/commit/1ea0ab19c5208f66509e1c43b0d0f21c1fd29b75
- WEBhttps://snyk.io/vuln/SNYK-JS-CONVICT-2774757