CVE-2026-91811
Foxit PDF Editor/Reader PRC Stream Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability
Description
A heap-based out-of-bounds write vulnerability exists in Foxit PDF Editor/Reader’s PRC parser due to insufficient validation of vertex indices in triangular fan texture meshes. Successful exploitation could result in memory corruption and an application crash.
INFO
Published Date :
Sept. 23, 2026, 8:17 a.m.
Last Modified :
Oct. 15, 2026, 2:10 p.m.
Remotely Exploit :
No
Source :
14984358-7092-470d-8f34-ade47a7658a2
Affected Products
The following products are affected by CVE-2026-91811
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 14984358-7092-470d-8f34-ade47a7658a2 |
Solution
- Update Foxit PDF Editor/Reader to the latest version.
- Apply vendor patches for PRC parser vulnerabilities.
- Validate vertex indices in mesh processing.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-91811.
| URL | Resource |
|---|---|
| https://www.foxit.com/support/security-bulletins.html | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-91811 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-91811
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-91811 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-91811 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Oct. 15, 2026
Action Type Old Value New Value Added CPE Configuration AND OR *cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:* versions from (including) 2023.1.0.15510 up to (including) 2023.3.0.23028 *cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:* versions from (including) 2024.1.0.23997 up to (including) 2024.4.1.27687 *cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:* versions from (including) 2025.1.0.27937 up to (including) 2025.3.0.35737 *cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:* versions up to (including) 13.2.5.63482 *cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:* versions from (including) 14.0.0.33046 up to (including) 14.0.7.33751 *cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:* versions from (including) 2026.1.0.36452 up to (including) 2026.2.0.39747 *cpe:2.3:a:foxit:pdf_reader:*:*:*:*:*:*:*:* versions up to (including) 2026.2.0.39747 OR cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:* versions from (including) 2023.1.0.55583 up to (including) 2023.3.0.63083 *cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:* versions from (including) 2024.1.0.63682 up to (including) 2024.4.1.66479 *cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:* versions up to (including) 13.2.2.63349 *cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:* versions from (including) 2025.1.0.66692 up to (including) 2025.3.0.69570 *cpe:2.3:a:foxit:pdf_reader:*:*:*:*:*:*:*:* versions up to (including) 2026.2.1.39815 *cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:* versions from (including) 14.0.0.68868 up to (including) 14.0.7.69441 *cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:* versions from (including) 2026.1.0.70169 up to (including) 2026.2.0.72029 OR cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Added Reference Type Foxit: https://www.foxit.com/support/security-bulletins.html Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Sep. 23, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-91811', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-09-23T14:39:37.958469Z'} -
New CVE Received by 14984358-7092-470d-8f34-ade47a7658a2
Sep. 23, 2026
Action Type Old Value New Value Added Description A heap-based out-of-bounds write vulnerability exists in Foxit PDF Editor/Reader’s PRC parser due to insufficient validation of vertex indices in triangular fan texture meshes. Successful exploitation could result in memory corruption and an application crash. Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CWE CWE-787 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/91xxx/CVE-2026-91811.json">CVE-2026-91811</a> Added Reference https://www.foxit.com/support/security-bulletins.html