CVE-2026-3779: foxit software inc. foxit pdf editor Use After Free

Vulnerability summary

CVE-2026-3779 is a high (CVSS 7.8) Use After Free vulnerability in foxit software inc. foxit pdf editor. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 11.9% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 01-04-2026
   PublishedVulnerability first disclosed.
2. 02-04-2026
   Last modifiedVulnerability information updated.

Description

The application's list box calculate array logic keeps stale references to page or form objects after they are deleted or re-created, which allows crafted documents to trigger a use-after-free when the calculation runs and can potentially lead to arbitrary code execution.

• CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.