Artifex mupdf up to 1.27.0-rc1 EPUB File css-apply.c value_from_inheritable_property recursion

Summaryinfo

A vulnerability classified as problematic has been found in Artifex mupdf up to 1.27.0-rc1. This issue affects the function value_from_inheritable_property of the file css-apply.c of the component EPUB File Handler. The manipulation leads to recursion. This vulnerability is traded as CVE-2025-71382. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Artifex mupdf up to 1.27.0-rc1. It has been rated as problematic. This issue affects the function value_from_inheritable_property of the file css-apply.c of the component EPUB File Handler. The manipulation with an unknown input leads to a recursion vulnerability. Using CWE to declare the problem leads to CWE-674. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. Impacted is availability. The summary by CVE is:

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.

The weakness was shared by Ishayu Potey. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2025-71382 since 06/23/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 1.27.0-rc1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 70b71ab22e6de4d4c44cd301c88231f623a4e94e is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Document Reader Software

Vendor

• Artifex

Name

• mupdf

Version

• 1.27.0-rc1

License

• commercial

Website

• Vendor: https://artifex.com/

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