CVE-2026-91814 Security feature bypass in Foxit PDF Editor
Attackers can modify signed PDF content without invalidating the signature, enabling content spoofing in Foxit PDF Editor and Reader.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-91814?
CVE-2026-91814 is a medium-severity vulnerability in Foxit Pdf Editor, published on 23 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A signature validation vulnerability exists in Foxit PDF Editor/Reader’s handling of incrementally updated PDF documents. Changes to visible document content may not invalidate the existing signature, allowing attackers to alter signed content and potentially carry out content spoofing while the document continues to appear validly signed.
Weakness: CWE-347
Which versions are affected by CVE-2026-91814?
It affects 2 products.
Products include Foxit Pdf Editor, Foxit Pdf Reader.
How do I fix CVE-2026-91814?
No fix has been published for CVE-2026-91814 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-91814 being exploited?
There is no known exploitation of CVE-2026-91814 in the wild and no public exploit code.
Other vulnerabilities in Foxit Pdf Editor
Sources
Also known as GHSA-c9r7-69j9-jq5j.