Quick answers
- Is CVE-2026-84434 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-84434 being exploited in the wild.
- How severe is CVE-2026-84434?
- Critical severity, with a CVSS score of 9.8, published 19 September 2026.
- Which products and versions are affected?
- Gravity Forms up to and including 3.1.0.4.
- Is there a fix for CVE-2026-84434?
- A patch was published on 2026-09-17: Fixed in version 3.1.2 per changelog Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-84434 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-84434?
- Check whether you run Gravity Forms at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability exists in the upload_file function due to a mismatch between the field validation pipeline and the file persistence pipeline. Hidden file upload fields bypass extension validation, and rejected files retain their upload state, which is later passed to upload_file() without re-validation. An unauthenticated attacker can exploit this on any publicly accessible form containing a File Upload field with Visibility set to Hidden.
Affected products
- Gravity Forms Gravity Forms up to and including 3.1.0.4
Timeline
- 2026-09-19: disclosed: CVE-2026-84434 published
- 2026-09-17: patched: Fixed in version 3.1.2 per changelog