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 i…

Medium CVSS 6.1

CVECVE-2026-91817

First seen2026-09-23 08:32 UTC

Disclosed2026-09-23 08:17 UTC

Last updated2026-09-23 08:32 UTC

Channel statusauto

Summary

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.

In-depth triage

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Sources

NVD DATABASE

Original Links

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

Timeline

2026-09-23 nvd_ingest NVD