GHSA-2j2x-2gpw-g8fm

flat vulnerable to Prototype Pollution

Source: GitHub Advisory Database (reviewed) Critical CVE-2020-36632

Packages

Ecosystem	Package	Affected	Fixed in
npm	flat	< 1.6.2	1.6.2
npm	flat	>= 2.0.0, < 2.0.2	2.0.2
npm	flat	>= 3.0.0, < 3.0.1	3.0.1
npm	flat	>= 4.0.0, < 4.0.2	4.0.2
npm	flat	>= 5.0.0, < 5.0.1	5.0.1

Details

As written in the advisory (Markdown source, shown as plain text).

flat helps flatten/unflatten nested Javascript objects. A vulnerability, which was classified as critical, was found in hughsk flat up to 5.0.0. This affects the function unflatten of the file index.js. The manipulation leads to improperly controlled modification of object prototype attributes ('prototype pollution'). It is possible to initiate the attack remotely. Upgrading to version 5.0.1 can address this issue. The name of the patch is 20ef0ef55dfa028caddaedbcb33efbdb04d18e13. It is recommended to upgrade the affected component. The identifier VDB-216777 was assigned to this vulnerability.

References

External links from the advisory. They lead to third-party sites.