Uncontrolled Recursion in MuPDF - CVE-2023-31794
Published: November 26, 2025
Vulnerability identifier: #VU118774
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-31794
CWE-ID: CWE-674
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to crash the application.
The vulnerability exists due to an infinite recursion within the pdf_mark_list_push() function. A remote attacker can trick the victim into opening a specially crafted PDF file and render the application unresponsive.
Affected software
MuPDF
How to mitigate CVE-2023-31794
Install updates from vendor's website.