foxitCVE-2026-91817
A heap-based out-of-bounds read vulnerability exists in Foxit PDF Editor/Reader’s handling of wide strings in embedded PDF JavaScript.
Medium6.1CVE-2026-91817 · Published Sep 23, 2026
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Foxit PDF Editor Vendor | <= Versions 2026.2 and earlier | No fix yet |
| <= Versions 14.0.7 and earlier | No fix yet | |
| <= Versions 13.2.6 and earlier | No fix yet | |
| Foxit PDF Reader Vendor | <= Versions 2026.2 and earlier | No fix yet |
Details and references
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.
- CVSS 3.1
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
- Severity from
- no source yet
- Weakness
- CWE-125