CVE-2026-16150 RobinHerbots Inputmask Internal Deep Merge Helper extend.js extendAliases prototype pollution
Remote attackers can exploit prototype pollution in the deep merge helper to achieve arbitrary code execution in applications using this input masking library.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-16150?
CVE-2026-16150 is a medium-severity code injection vulnerability in RobinHerbots Inputmask, published on 18 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in RobinHerbots Inputmask up to 5.0.9. Affected by this issue is the function extendDefaults/extendDefinitions/extendAliases in the library lib/dependencyLibs/extend.js of the component Internal Deep Merge Helper. The manipulation results in improperly controlled modification of object prototype attributes. The attack may be performed from remote. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-16150?
How do I fix CVE-2026-16150?
No fix has been published for CVE-2026-16150 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-16150 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-16150 exists.
Sources
Also known as GHSA-f93p-5vr9-j8vq.