Uncontrolled recursion in MuPDF - CVE-2025-46206
Published: November 26, 2025
Vulnerability identifier: #VU118775
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-2025-46206
CWE-ID: CWE-674
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an infinite recursion in the `mutool clean` utility. A remote attacker can trick the victim into opening a specially crated PDF file and crash the application.
Affected software
MuPDF
Fedora
Ubuntu
mupdf (Ubuntu package)
mupdf
Fedora
Ubuntu
mupdf (Ubuntu package)
mupdf
How to mitigate CVE-2025-46206
Install updates from vendor's website.
MuPDF - update to 1.26.0
mupdf (Ubuntu package) - addressed in versions 1.12.0+ds1-1ubuntu0.1~esm2, 1.16.1+ds1-1ubuntu1+esm2, 1.19.0+ds1-2ubuntu0.1~esm1, 1.23.10+ds1-1ubuntu0.1~esm1, 1.25.1+ds1-5ubuntu0.1
mupdf - addressed in versions 1.25.4-2.el10_1, 1.25.4-2.fc41
mupdf (Ubuntu package) - addressed in versions 1.12.0+ds1-1ubuntu0.1~esm2, 1.16.1+ds1-1ubuntu1+esm2, 1.19.0+ds1-2ubuntu0.1~esm1, 1.23.10+ds1-1ubuntu0.1~esm1, 1.25.1+ds1-5ubuntu0.1
mupdf - addressed in versions 1.25.4-2.el10_1, 1.25.4-2.fc41