CVE-2026-91806
7.8 · HIGHA use-after-free vulnerability exists in Foxit PDF Editor/Reader’s handling of PDF form fields.
Overview
CVE-2026-91806 is a high-severity vulnerability affecting foxit pdf_editor. It was published on September 23, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical description
A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s handling of PDF form fields. Embedded JavaScript may access form-field references after the corresponding fields have been released, resulting in an application crash.
Remediation
Check the references section for vendor advisories and patches from foxit. Update pdf_editor to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| foxit | pdf_editor | 0 | Affected |
| foxit | pdf_reader | 0 | Affected |
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Frequently asked questions
What is CVE-2026-91806?
CVE-2026-91806 is a high-severity vulnerability affecting foxit pdf_editor. It was published on September 23, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).
How severe is CVE-2026-91806?
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-91806?
Check the references section for vendor advisories and patches from foxit. Update pdf_editor to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-91806?
CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-91806 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.
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