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 is a high-severity vulnerability in ArtifexSoftware's MuPDF EPUB rendering engine affecting versions before 1.27.0-rc1. The issue is an uncontrolled recursion in the function value_from_inheritable_property() within css-apply.c, which processes CSS property inheritance chains without limiting recursion depth. An attacker can exploit this by crafting EPUB files with deeply nested HTML and inline CSS, causing the process stack to exhaust and crash the application, resulting in denial of service.
Potential Impact
Successful exploitation results in denial of service due to application crash caused by stack exhaustion. There is no indication of code execution, data leakage, or privilege escalation. The vulnerability can be triggered remotely by supplying a malicious EPUB file to any application using the affected MuPDF versions for EPUB rendering.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch has been documented at this time. Until a patch is available, users should consider restricting or validating EPUB files from untrusted sources to mitigate risk.
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 is a high-severity vulnerability in ArtifexSoftware's MuPDF EPUB rendering engine affecting versions before 1.27.0-rc1. The issue is an uncontrolled recursion in the function value_from_inheritable_property() within css-apply.c, which processes CSS property inheritance chains without limiting recursion depth. An attacker can exploit this by crafting EPUB files with deeply nested HTML and inline CSS, causing the process stack to exhaust and crash the application, resulting in denial of service.
Potential Impact
Successful exploitation results in denial of service due to application crash caused by stack exhaustion. There is no indication of code execution, data leakage, or privilege escalation. The vulnerability can be triggered remotely by supplying a malicious EPUB file to any application using the affected MuPDF versions for EPUB rendering.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch has been documented at this time. Until a patch is available, users should consider restricting or validating EPUB files from untrusted sources to mitigate risk.
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: 07/15/2026, 09:54:19 UTC
Last updated: 08/09/2026, 00:41:11 UTC
Views: 46
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