UBUNTU-CVE-2026-82035

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Source
https://ubuntu.com/security/CVE-2026-82035
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-82035.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-82035
Upstream
Published
2026-09-14T19:17:00Z
Modified
2026-09-16T14:03:16Z
Severity
  • 7.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L CVSS Calculator
  • 7.1 (High) CVSS_V4 - 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 Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:20.04:LTS / pymupdf

Package

Name
pymupdf
Purl
pkg:deb/ubuntu/pymupdf?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.16.11-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-fitz",
            "binary_version": "1.16.11-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-82035.json"

Ubuntu:22.04:LTS / pymupdf

Package

Name
pymupdf
Purl
pkg:deb/ubuntu/pymupdf?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.17.4+ds1-2build2
1.17.4+ds1-2build3
1.19.2+ds1-1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-fitz",
            "binary_version": "1.19.2+ds1-1ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-82035.json"

Ubuntu:24.04:LTS / pymupdf

Package

Name
pymupdf
Purl
pkg:deb/ubuntu/pymupdf?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.22.5+ds1-1
1.22.5+ds1-1build1
1.22.5+ds1-1build2
1.23.7+ds1-1ubuntu1
1.23.7+ds1-1ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-fitz",
            "binary_version": "1.23.7+ds1-1ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-82035.json"

Ubuntu:26.04:LTS / pymupdf

Package

Name
pymupdf
Purl
pkg:deb/ubuntu/pymupdf?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.25.4+ds1-4
1.26.7+ds1-1
1.26.7+ds1-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-fitz",
            "binary_version": "1.26.7+ds1-1build1"
        },
        {
            "binary_name": "python3-pymupdf",
            "binary_version": "1.26.7+ds1-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-82035.json"