CVE-2026-3308: CWE-190 Integer Overflow or Wraparound in Artifex Software Inc. *PyMuPDF* MuPDF
An integer overflow vulnerability in 'pdf-image.c' in Artifex's MuPDF version 1.27.0 allows an attacker to maliciously craft a PDF that can trigger an integer overflow within the 'pdf_load_image_imp' function. This allows a heap out-of-bounds write that could be exploited for arbitrary code execution.
AI Analysis
Technical Summary
This vulnerability involves an integer overflow in the 'pdf_load_image_imp' function of MuPDF 1.27.0, specifically in the 'pdf-image.c' source file. An attacker can craft a PDF file that triggers this overflow, causing a heap out-of-bounds write. This memory corruption could be leveraged to execute arbitrary code on the affected system. The CVSS 3.1 vector indicates the attack requires local access with low complexity, no privileges, and user interaction, impacting confidentiality, integrity, and availability with high severity.
Potential Impact
Successful exploitation can lead to arbitrary code execution due to heap memory corruption caused by the integer overflow. This compromises the confidentiality, integrity, and availability of the affected system. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, avoid opening untrusted PDF files with the affected MuPDF version. Monitor vendor channels for updates regarding patches or mitigations.
CVE-2026-3308: CWE-190 Integer Overflow or Wraparound in Artifex Software Inc. *PyMuPDF* MuPDF
Description
An integer overflow vulnerability in 'pdf-image.c' in Artifex's MuPDF version 1.27.0 allows an attacker to maliciously craft a PDF that can trigger an integer overflow within the 'pdf_load_image_imp' function. This allows a heap out-of-bounds write that could be exploited for arbitrary code execution.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer overflow in the 'pdf_load_image_imp' function of MuPDF 1.27.0, specifically in the 'pdf-image.c' source file. An attacker can craft a PDF file that triggers this overflow, causing a heap out-of-bounds write. This memory corruption could be leveraged to execute arbitrary code on the affected system. The CVSS 3.1 vector indicates the attack requires local access with low complexity, no privileges, and user interaction, impacting confidentiality, integrity, and availability with high severity.
Potential Impact
Successful exploitation can lead to arbitrary code execution due to heap memory corruption caused by the integer overflow. This compromises the confidentiality, integrity, and availability of the affected system. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, avoid opening untrusted PDF files with the affected MuPDF version. Monitor vendor channels for updates regarding patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- certcc
- Date Reserved
- 2026-02-26T21:04:05.303Z
- Cvss Version
- null
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.kb.cert.org/vuls/id/951662","vendor":"CERT"}]
Threat ID: 69cbd1cfe6bfc5ba1d19baec
Added to database: 3/31/2026, 1:53:19 PM
Last enriched: 4/22/2026, 6:09:20 AM
Last updated: 5/15/2026, 8:08:33 AM
Views: 126
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