CVE-2026-82035
PyMuPDF 1.28.2 Path Traversal via extract_objects() Font Branch
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Passive
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
PyMuPDF 1.28.2 Path Traversal via extract_objects() Font Branch
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.
- Record
CVE-2026-82035- CVSS 4.0
- 7.1 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N - CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L - Weakness
- CWE-22
- Updated
- 2026-11-02
EUVDEUVD-2026-77764
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.
- Record
EUVD-2026-77764- CVSS 4.0
- 7.1 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-434w-92hw-f2m3
PyMuPDF through 1.28.2, fixed in commit b2c8f3a, contains a path traversal vulnerability in the...
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.
- Record
GHSA-434w-92hw-f2m3- CVSS 4.0
- 7.1 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L - Weakness
- CWE-22
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-82035- CVSS 4.0
- 7.1 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L - Weakness
- CWE-22
- Updated
- 2026-11-02
OSV
PyMuPDF 1.28.2 Path Traversal via extract_objects() Font Branch
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.
- Record
CVE-2026-82035- CVSS 4.0
- 7.1 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N - Weakness
- CWE-22
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-82035
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.
- Record
DEBIAN-CVE-2026-82035- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-82035
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.
- Record
UBUNTU-CVE-2026-82035- CVSS 4.0
- 7.1 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N - CVSS 3.1
- 7.1 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L - Updated
- 2026-11-02
OSVopenSUSE-SU-2026:11824-1 No score
python313-PyMuPDF-1.28.2-1.1 on GA media
These are all security issues fixed in the python313-PyMuPDF-1.28.2-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2026:11824-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2026:21912-1 No score
Security update for python-PyMuPDF
This update for python-PyMuPDF fixes the following issues:
Changes in python-PyMuPDF:
- CVE-2026-82035: a path traversal vulnerability in the font branch of extract_objects() in src/main.py (bsc#1280486)
- Record
openSUSE-SU-2026:21912-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
pymupdfDebian:12 |
All versions, plus listed versions 1.21.1+ds1-11.22.5+ds1-11.23.7+ds1-11.24.2+ds1-11.24.2+ds1-2 Show 9 moreShow less1.24.2+ds1-31.25.0+ds1-11.25.0+ds1-21.25.4+ds1-11.25.4+ds1-21.25.4+ds1-31.25.4+ds1-41.26.7+ds1-11.28.2+ds1-1 |
None known |
pymupdfDebian:13 |
All versions, plus listed versions 1.25.4+ds1-31.25.4+ds1-3+deb13u11.25.4+ds1-41.26.7+ds1-11.28.2+ds1-1 |
None known |
pymupdfDebian:14 |
All versions, plus listed versions 1.25.4+ds1-31.25.4+ds1-41.26.7+ds1-11.28.2+ds1-1 |
None known |
pymupdfUbuntu:20.04:LTS |
All versions, plus listed versions 1.16.11-1 |
None known |
pymupdfUbuntu:22.04:LTS |
All versions, plus listed versions 1.17.4+ds1-2build21.17.4+ds1-2build31.19.2+ds1-1ubuntu1 |
None known |
pymupdfUbuntu:24.04:LTS |
All versions, plus listed versions 1.22.5+ds1-11.22.5+ds1-1build11.22.5+ds1-1build21.23.7+ds1-1ubuntu11.23.7+ds1-1ubuntu2 |
None known |
pymupdfUbuntu:26.10 |
All versions, plus listed versions 1.26.7+ds1-1build1 |
None known |
pymupdfUbuntu:26.04:LTS |
All versions, plus listed versions 1.25.4+ds1-41.26.7+ds1-11.26.7+ds1-1build1 |
None known |
python-PyMuPDFopenSUSE:Tumbleweed |
before 1.28.2-1.1 | 1.28.2-1.1 |
python-PyMuPDFopenSUSE:Leap 16.0 |
before 1.21.1-lp160.6.1 | 1.21.1-lp160.6.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-82035 is a high vulnerability (CVSS 7.1) in Artifex Software Inc. *pymupdf* Pymupdf, published September 14, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.32%, the 24th percentile. Fixed in python-PyMuPDF 1.28.2-1.1.
References
github.com/pymupdf/PyMuPDF/commit/b2c8f3a859fed35c379a44df566f770dc3e18605
vulncheck.com/advisories/pymupdf-path-traversal-via-extract-objects-font-branch
nvd.nist.gov/vuln/detail/CVE-2026-82035