GHSA-gm9g-2g8v-fvxj Prototype Pollution in upmerge
Attackers can pollute object prototypes via the merge function, potentially causing denial of service or remote code execution 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
- None listed
What is GHSA-gm9g-2g8v-fvxj?
GHSA-gm9g-2g8v-fvxj is a vulnerability in upmerge, published on 6 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
All versions of upmerge are vulnerable to Prototype Pollution. The merge() function fails to prevent user input to alter an Object's prototype, allowing attackers to modify override properties of all objects in the application. This may lead to Denial of Service or may be chained with other vulnerabilities leading to Remote Code Execution.
Recommendation
No fix is currently available. Consider using an alternative module until a fix is made available.
Which versions are affected by GHSA-gm9g-2g8v-fvxj?
2 open source packages ship an affected version, including upmerge.
| Package | Affected | Fixed in |
|---|---|---|
upmerge npm | All versions to 0.1.8 | None |
upmerge npm | All versions to 0.1.8 | None |
How do I fix GHSA-gm9g-2g8v-fvxj?
No fix has been published for GHSA-gm9g-2g8v-fvxj yet. Limit exposure of the affected software until one is available.
Is GHSA-gm9g-2g8v-fvxj being exploited?
There is no known exploitation of GHSA-gm9g-2g8v-fvxj in the wild and no public exploit code.