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Vulnerability · Published Sep 14, 2026 · Assigned by VulnCheck

CVE-2026-82035PyMuPDF 1.28.2 Path Traversal via extract_objects() Font Branch

High 7.1

In plain English

A high-severity path traversal in PyMuPDF from PyMuPDF. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities).

Severity (CVSS 3.1)7.1High
Exploit odds (30 days)0.3%top 75.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12pymupdfno fix listedDEBIAN-CVE-2026-82035
Debian:13pymupdfno fix listedDEBIAN-CVE-2026-82035
Debian:14pymupdfno fix listedDEBIAN-CVE-2026-82035
Ubuntu:22.04:LTSpymupdfno fix listedUBUNTU-CVE-2026-82035
Ubuntu:24.04:LTSpymupdfno fix listedUBUNTU-CVE-2026-82035
Ubuntu:26.04:LTSpymupdfno fix listedUBUNTU-CVE-2026-82035
Ubuntu:26.10pymupdfno fix listedUBUNTU-CVE-2026-82035

Affected products (as reported)

VendorProductVersions
PyMuPDF PyMuPDF 0 – through 1.8.2

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L

References