Medium severity · published Apr 1, 2026
CVE-2026-3778
Stack exhaustion caused by cyclic references in Foxit PDF Editor/Reader
5.5
CVSS
0.1%
EPSS
No
On KEV
Description
The application does not detect or guard against cyclic PDF object references while handling JavaScript in PDF. When pages and annotations are crafted that reference each other in a loop, passing the document to APIs (e.g., SOAP) that perform deep traversal can cause uncontrolled recursion, stack exhaustion, and application crashes.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 1% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FP
Foxit PDF Editor · Foxit Software Inc.
Versions 2025.3 and earlier; Versions 14.0.2 and earlier; Versions 13.2.2 and earlier · source: vendor
FP
Foxit PDF Reader · Foxit Software Inc.
Versions 2025.3 and earlier · source: vendor
PE
Pdf Editor · Foxit
through 13.2.2.24014; 14.0.0.33046 through 14.0.2.33402; 2023.1.0.15510 through 2023.3.0.23028; 2024.1.0.23997 through 2024.4.1.27687; 2025.1.0.27937 through 2025.3.0.35737; through 13.2.2.63349; +4 more · source: NVD
PR
Pdf Reader · Foxit
through 2025.3.0.35737; through 2025.3.0.69570 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3778
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3778
Vendor Advisory
https://www.foxit.com/support/security-bulletins.html
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