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.
Severity (CVSS)
| Base score | 7.1 |
|---|---|
| Severity | High |
| Version | CVSS 4.0 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| Provided by | CNA |
Weaknesses
- CWE-674 — Uncontrolled Recursion
Affected products
| Vendor | Product | Versions |
|---|---|---|
| ArtifexSoftware | mupdf | 0 to <1.27.0-rc1 |
References
- https://github.com/ArtifexSoftware/mupdf/releases/tag/1.27.0-rc1 (release-notes)
- https://bugs.ghostscript.com/show_bug.cgi?id=708840 (technical-description exploit)
- https://github.com/ArtifexSoftware/mupdf/commit/70b71ab22e6de4d4c44cd301c88231f623a4e94e (patch)
- https://www.vulncheck.com/advisories/mupdf-rc1-stack-exhaustion-dos-via-epub-css-rendering (third-party-advisory)
Generated from the official CVE List on 24 Jun 2026 09:35 UTC.