CVE-2026-87796 Multi Uploader for Gravity Forms <= 1.1.9 - Unauthenticated Arbitrary File Upload via Chunked File Upload
Unauthenticated attackers can upload arbitrary files via chunked uploads, potentially leading to remote code execution on WordPress sites using this plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-87796?
CVE-2026-87796 is a critical vulnerability in sh1zen Multi Uploader for Gravity Forms, published on 17 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Multi Uploader for Gravity Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.1.9 via the move_file function. This is due to insufficient file type validation during chunked upload handling. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.
Weakness: CWE-434
Which versions are affected by CVE-2026-87796?
How do I fix CVE-2026-87796?
No fix has been published for CVE-2026-87796 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-87796 being exploited?
There is no known exploitation of CVE-2026-87796 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-h7vp-g8q2-89c8.