Medium · published September 23, 2026
A heap-based out-of-bounds read vulnerability exists in Foxit PDF Editor/Reader’s handling of wide strings in embedded PDF JavaScript. Insufficient validation of string-deletion ranges can cause an integer underflow, resulting in an out-of-bounds read and application crash.
| Product | Versions | Fixed in |
|---|---|---|
| foxit/pdf_editor | ≤ 13.2.5.63482 | — |
| foxit/pdf_editor | ≥ 14.0.0.33046, ≤ 14.0.7.33751 | — |
| foxit/pdf_editor | ≥ 2023.1.0.15510, ≤ 2023.3.0.23028 | — |
| foxit/pdf_editor | ≥ 2024.1.0.23997, ≤ 2024.4.1.27687 | — |
| foxit/pdf_editor | ≥ 2025.1.0.27937, ≤ 2025.3.0.35737 | — |
| foxit/pdf_editor | ≥ 2026.1.0.36452, ≤ 2026.2.0.39747 | — |
| foxit/pdf_reader | ≤ 2026.2.0.39747 | — |