CVE-2025-71382: Uncontrolled Recursion in ArtifexSoftware mupdf
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.
AI Analysis
Technical Summary
CVE-2025-71382 describes an uncontrolled recursion vulnerability in ArtifexSoftware's MuPDF EPUB CSS rendering engine prior to version 1.27.0-rc1. The vulnerability exists in the function value_from_inheritable_property() within css-apply.c, which recursively traverses CSS property inheritance chains without a depth limit. Malicious EPUB files with deeply nested HTML elements and inline CSS styles can trigger this recursion, exhausting the process stack and causing a crash. This leads to a denial of service condition in any application using MuPDF for EPUB rendering.
Potential Impact
Successful exploitation results in denial of service by crashing the application processing the malicious EPUB file. There is no indication of code execution or data disclosure. The vulnerability can be triggered remotely by supplying a crafted EPUB file.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Users should monitor ArtifexSoftware advisories for updates and avoid processing untrusted EPUB files until a fix is available.
CVE-2025-71382: Uncontrolled Recursion in ArtifexSoftware mupdf
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 v4.0
Score 7.1high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-71382 describes an uncontrolled recursion vulnerability in ArtifexSoftware's MuPDF EPUB CSS rendering engine prior to version 1.27.0-rc1. The vulnerability exists in the function value_from_inheritable_property() within css-apply.c, which recursively traverses CSS property inheritance chains without a depth limit. Malicious EPUB files with deeply nested HTML elements and inline CSS styles can trigger this recursion, exhausting the process stack and causing a crash. This leads to a denial of service condition in any application using MuPDF for EPUB rendering.
Potential Impact
Successful exploitation results in denial of service by crashing the application processing the malicious EPUB file. There is no indication of code execution or data disclosure. The vulnerability can be triggered remotely by supplying a crafted EPUB file.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Users should monitor ArtifexSoftware advisories for updates and avoid processing untrusted EPUB files until a fix is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-06-23T17:14:32.284Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3ac4efeed863c81e618225
Added to database: 06/23/2026, 17:39:59 UTC
Last enriched: 06/23/2026, 17:54:33 UTC
Last updated: 06/23/2026, 23:21:38 UTC
Views: 8
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