CVE-2020-36632 hughsk flat index.js unflatten prototype pollution
Prototype pollution in the flat library allows remote attackers to modify object prototypes, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-36632?
CVE-2020-36632 is a medium-severity vulnerability in hughsk flat, published on 25 Dec 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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 is able to 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.
Weakness: CWE-1321
Which versions are affected by CVE-2020-36632?
10 open source packages ship an affected version, including flat. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
flat npm | All versions | 1.6.2 |
flat npm | All versions | 1.6.2 |
flat npm | From 2.0.0 | 2.0.2 |
flat npm | From 2.0.0 | 2.0.2 |
flat npm | From 3.0.0 | 3.0.1 |
flat npm | From 3.0.0 | 3.0.1 |
4 more packages
flat npm | From 4.0.0 | 4.0.2 |
flat npm | From 4.0.0 | 4.0.2 |
flat npm | From 5.0.0 | 5.0.1 |
flat npm | From 5.0.0 | 5.0.1 |
Products include Flat Project Flat.
How do I fix CVE-2020-36632?
Upgrade flat to a fixed version for your release line: 1.6.2, 2.0.2, 3.0.1 or 4.0.2.
Is CVE-2020-36632 being exploited?
There is no known exploitation of CVE-2020-36632 in the wild and no public exploit code.
Sources
Also known as CLSA-2026-1771546205, GHSA-2j2x-2gpw-g8fm, ROOT-APP-NPM-CVE-2020-36632, UBUNTU-CVE-2020-36632.