Vulnerability details
CVE-2026-82035
PyMuPDF PyMuPDF
PyMuPDF 1.28.2 Path Traversal via extract_objects() Font Branch
CVSS 4.0
7.1High
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.1High | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | 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 |
| 7.1High | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| PyMuPDF | PyMuPDF | v ≤ 1.8.2 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2026-09-14
- Last updated
- 2026-09-14
- State
- Published
- Assigner (CNA)
- VulnCheck
Exploit prediction (EPSS)
0.31%
Probability of exploitation in 30 days
24.6%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')