Medium severity · published Jun 23, 2026
CVE-2025-71382
MuPDF < 1.27.0-rc1 Stack Exhaustion DoS via EPUB CSS Rendering
6.5
CVSS
0.6%
EPSS
No
On KEV
Description
MuPDF before 1.27.0-rc1 contains an uncontrolled recursion vulnerability in the EPUB CSS rendering engine that allows remote attackers to cause a denial of service by supplying a maliciously crafted EPUB file with deeply nested HTML elements and inline CSS styles. The function value_from_inheritable_property() in css-apply.c recurses through the CSS property inheritance chain without a depth limit, exhausting the process stack and causing a crash in any application using MuPDF for EPUB rendering.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MU
mupdf · ArtifexSoftware
before 1.27.0-rc1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-71382
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-71382
Exploit
https://bugs.ghostscript.com/show_bug.cgi?id=708840
Patch
https://github.com/ArtifexSoftware/mupdf/commit/70b71ab22e6de4d4c44cd301c88231f623a4e94e
Release Notes
https://github.com/ArtifexSoftware/mupdf/releases/tag/1.27.0-rc1
Patch
https://www.vulncheck.com/advisories/mupdf-rc1-stack-exhaustion-dos-via-epub-css-rendering