NULL Pointer Dereference Affecting pymupdf package, versions [1.24.0,1.27.1)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-PYMUPDF-13058632
- published26 Sept 2025
- disclosed23 Sept 2025
- credit3Ishayu
Introduced: 23 Sep 2025
CVE-2025-55780 (opens in a new tab)How to fix?
Upgrade PyMuPDF to version 1.27.1 or higher.
Overview
PyMuPDF is an A high performance Python library for data extraction, analysis, conversion & manipulation of PDF (and other) documents.
Affected versions of this package are vulnerable to NULL Pointer Dereference via the break_word_for_overflow_wrap() function when rendering a malformed EPUB document. An attacker can cause a crash by supplying a specially crafted EPUB file that triggers a null pointer dereference in the processing of FLOW_WORD nodes.