CVE-2026-91788 Foxit PDF Editor/Reader Missing Authorization Information Disclosure Vulnerability
A malicious PDF can bypass authorization checks to access sensitive data from other documents in the same process and exfiltrate it.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-91788?
CVE-2026-91788 is a medium-severity missing authorization vulnerability in Foxit Pdf Editor, published on 23 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
When implementing the JavaScript interface, Foxit PDF Editor/Reader did not perform the attribute authorization checks required by the specification. As a result, a trusted malicious PDF could potentially access sensitive content from other documents within the same process and transmit it externally.
Weakness: CWE-668
Which versions are affected by CVE-2026-91788?
It affects 2 products.
Products include Foxit Pdf Editor, Foxit Pdf Reader.
How do I fix CVE-2026-91788?
No fix has been published for CVE-2026-91788 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-91788 being exploited?
There is no known exploitation of CVE-2026-91788 in the wild and no public exploit code.
Other vulnerabilities in Foxit Pdf Editor
Sources
Also known as GHSA-mw87-v3r3-7j2h.