GHSA-5947-m4fg-xhqg Prototype Pollution in lodash.mergewith
Attackers can pollute Object prototypes via mergeWith, potentially leading to code execution or privilege escalation in applications using this library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is GHSA-5947-m4fg-xhqg?
GHSA-5947-m4fg-xhqg is a vulnerability in lodash.mergewith, published on 3 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Versions of lodash.mergewith before 4.6.1 are vulnerable to Prototype Pollution. The function 'mergeWith' may allow a malicious user to modify the prototype of Object via __proto__ causing the addition or modification of an existing property that will exist on all objects.
Recommendation
Update to version 4.6.1 or later.
Which versions are affected by GHSA-5947-m4fg-xhqg?
2 open source packages ship an affected version, including lodash.mergewith.
| Package | Affected | Fixed in |
|---|---|---|
lodash.mergewith npm | All versions | 4.6.1 |
lodash.mergewith npm | All versions | 4.6.1 |
How do I fix GHSA-5947-m4fg-xhqg?
Upgrade lodash.mergewith to 4.6.1 or later.
Is GHSA-5947-m4fg-xhqg being exploited?
There is no known exploitation of GHSA-5947-m4fg-xhqg in the wild and no public exploit code.