CVE-2025-71382
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk24th percentile - higher than 24% of all known CVEs
Summary
A vulnerability in MuPDF before version 1.27.0-rc1 allows a DoS attack via a specially crafted EPUB file with deeply nested HTML elements and inline CSS styles. The function value_from_inheritable_property() in css-apply.c recursively processes the CSS inheritance chain without a depth limit, exhausting the stack and causing a crash.
Risk Assessment
An attacker can remotely crash any application using MuPDF for EPUB rendering, leading to denial of service (DoS) and potential loss of availability for users.
Recommendation
Immediately update MuPDF to version 1.27.0-rc1 or later, which includes a fix limiting recursion depth in the CSS engine.
Other vulnerabilities in MuPDF
See all- CVE-2017-6060High
A stack-based buffer overflow in jstest_main.c in mujstest in Artifex Software, Inc. MuPDF 1.10a allows remote attackers to have unspecified impact via a crafted image.
- CVE-2017-5991High
An issue was discovered in MuPDF before version 1912de5f08e90af1d9d0a9791f58ba3afdb9d465 related to a NULL pointer dereference in the pdf_run_xobject function during a Fitz fz_paint_pixmap_with_mask painting operation.
- CVE-2016-6525Critical
A heap-based buffer overflow in the pdf_load_mesh_params function in MuPDF can be exploited by remote attackers. Exploiting this vulnerability may lead to denial of service or arbitrary code execution via a large decode array.
- CVE-2026-25556High
A double-free vulnerability in MuPDF versions 1.23.0 through 1.27.0 exists in the fz_fill_pixmap_from_display_list() function during error handling. The function incorrectly drops a caller-owned fz_pixmap pointer in its error path before rethrowing the exception, leading to a double-free that can corrupt the heap and crash the process.
- CVE-2025-46206Medium
An infinite recursion vulnerability was found in Artifex MuPDF versions 1.25.5 and 1.25.6 within the `mutool clean` utility. A remote attacker can cause a denial of service (DoS) by supplying a crafted PDF file with cyclic /Next references in the outline structure.
Original NVD description (English source)
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.