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CVE-2026-91793

7.8 · HIGH

When opening a specially crafted PDF, Foxit PDF Editor/Reader executes scripts that modify annotation rich-text attributes containing malformed font data.

Published Sep 23, 2026foxitCWE-416EPSS 0.17%

Overview

CVE-2026-91793 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

When opening a specially crafted PDF, Foxit PDF Editor/Reader executes scripts that modify annotation rich-text attributes containing malformed font data. During subsequent annotation appearance reconstruction, it accesses an object after it has been released, resulting in a use-after-free condition and 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

VendorProductVersionsStatus
foxitpdf_editor0Affected
foxitpdf_reader0Affected

References

Refwww.foxit.com/support/security-bulletins.html

How CyberStrike helps

Frequently asked questions

What is CVE-2026-91793?

CVE-2026-91793 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-2026-91793?

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-2026-91793?

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-2026-91793?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-91793 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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