Bug 2533285 (CVE-2026-82035)

Summary: CVE-2026-82035 pymupdf: PyMuPDF: Arbitrary file write via path traversal vulnerability
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: bbrownin
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in PyMuPDF. This path traversal vulnerability exists in the `extract_objects()` function, specifically within the font branch. A remote attacker can exploit this by providing a specially crafted PDF, EPUB, XPS, or FB2 file. The vulnerability allows the attacker to use encoded path separators in the BaseFont name, leading to arbitrary file writes outside the intended output directory without requiring authentication or elevated privileges.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-09-14 18:51:29 UTC 
PyMuPDF through 1.28.2, fixed in commit b2c8f3a, contains a path traversal vulnerability in the font branch of extract_objects() in src/__main__.py, where the output filename is constructed by joining a document-controlled BaseFont name directly onto the user-supplied output directory without stripping path separators or dot-dot sequences. Attackers can supply a crafted PDF, EPUB, XPS, or FB2 file with a BaseFont name containing encoded path separators that decode to ../ sequences or absolute paths, causing arbitrary file writes outside the intended output directory without requiring authentication or elevated privileges.