CVE-2026-91814
Security vulnerability: Foxit PDF Editor/Reader Fails to Detect Modifications to Signed Documents Displaying Newly Added Content
CVSS Score
5.3
EPSS Score
0.2%
EPSS Percentile
7th
A signature validation vulnerability exists in Foxit PDF Editor/Reader’s handling of incrementally updated PDF documents. Changes to visible document content may not invalidate the existing signature, allowing attackers to alter signed content and potentially carry out content spoofing while the document continues to appear validly signed.
| CWE | CWE-347 |
| Vendor | foxit software inc. |
| Product | foxit pdf editor |
| Published | Sep 23, 2026 |
| Last Updated | Sep 23, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Affected Versions
Foxit Software Inc. / Foxit PDF Editor
Versions 2026.2 and earlier Versions 14.0.7 and earlier Versions 13.2.6 and earlier
Foxit Software Inc. / Foxit PDF Reader
Versions 2026.2 and earlier
References
Credits
Jan Slabon (Setasign GmbH & Co. KG), Germany