CVE-2026-91800 Foxit PDF Editor installer local privilege escalation

High 8.8 Published 23 Sep 2026 Updated 23 Sep 2026

A local attacker can execute arbitrary commands with root privileges by exploiting insufficient validation in the Foxit PDF Editor macOS installer during upgrades.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-91800?

CVE-2026-91800 is a high-severity vulnerability in Foxit Pdf Editor, published on 23 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A local privilege escalation vulnerability exists in the installer of Foxit PDF Editor for macOS due to insufficient validation of a user-modifiable configuration value during high-privilege upgrades. A local attacker could exploit this issue to execute arbitrary commands with root privileges.

Weakness: CWE-732

Which versions are affected by CVE-2026-91800?

It affects 2 products.

Products include Foxit Pdf Editor, Foxit Pdf Reader.

How do I fix CVE-2026-91800?

No fix has been published for CVE-2026-91800 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-91800 being exploited?

There is no known exploitation of CVE-2026-91800 in the wild and no public exploit code.

All Foxit Pdf Editor vulnerabilities

Sources

Also known as GHSA-3jfq-gmmh-mj79.