ZDI-26-738: Foxit PDF Reader Annotation Use-After-Free Information Disclosure Vulnerability
ZDI discloses a Foxit PDF Reader annotation use-after-free that can leak data if a user opens a malicious file.
The Zero Day Initiative published ZDI-26-738, an information-disclosure vulnerability in Foxit PDF Reader caused by a use-after-free in annotation handling. A remote attacker must trick a user into opening a malicious file or visiting a malicious page. ZDI assigned a CVSS score of 3.3 and CVE-2026-91809. The advisory does not report exploitation in the wild.
- Annotation use-after-free can disclose information from Foxit PDF Reader.
- Victim must open a malicious file or visit a malicious page.
- ZDI CVSS 3.3; tracked as CVE-2026-91809.
- Advisory does not report exploitation in the wild.
- CVEs
- CVE-2026-91809
- Vendors
- Foxit
- Products
- Foxit PDF Reader
- Organizations
- Zero Day Initiative
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-91809 | Use-after-free in Foxit PDF Editor/Reader form field handling | 7.8 | — |
From the original article
This vulnerability allows remote attackers to disclose sensitive information on affected installations of Foxit PDF Reader. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 3.
zerodayinitiative.com
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