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CVE-2026-13126: Foxit PDF Editor/Reader Annotation Use-After-Free Remote Code Execution Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-08 · updated 2026-07-09
• Weakness: CWE-416

Description

The embedded JavaScript in the PDF deleted the pages, making the object invalid. The application attempted to perform a write operation on the invalid pop-up annotations, resulting in the program crashing.

Affected products

• Foxit PDF Reader: through 13.2.4.24048; from 14.0.0.33046 through 14.0.4.33508; from 2023.1.0.15510 through 2023.3.0.23028; from 2024.1.0.23997 through 2024.4.1.27687; from 2025.1.0.27937 through 2025.3.0.35737; from 2026.1.0.36452 through 2026.1.1.36485
• Foxit Pdf Reader: through 2026.1.1.36485

References

• https://www.foxit.com/support/security-bulletins.html

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