MATE Desktop Atril Document Viewer EPUB File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability

June 11th, 2026
ZDI-26-360 ZDI-CAN-30289

CVE ID

CVE-2026-52849

CVSS Score

7.8 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors

MATE Desktop

Affected Products

Atril Document Viewer

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of MATE Desktop Atril Document Viewer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of XML attributes within epub files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

Additional Details

Fixed in 1.26.4 and 1.28.6 (https://github.com/mate-desktop/atril/pull/700)


Disclosure Timeline

  • 2026-05-20 - Vulnerability reported to vendor
  • 2026-06-11 - Coordinated public release of advisory
  • 2026-06-11 - Advisory Updated

Credit

Anonymous

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