High
PyMuPDF 1.28.2 Path Traversal via extract_objects() Font Branch
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-82035
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 03:52 UTC · Revision 1
Source evidence
PyMuPDF 1.28.2 Path Traversal via extract_objects() Font Branch
core-osv · Original sourcePublished 14 Sept 2026, 18:38 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.
osv:CVE-2026-82035
Complete source record
{
"id": "de6289625cf8cfdf2728821ce7387120bbabf84dfcb4449bf76695f43c339844",
"url": "https://osv.dev/vulnerability/CVE-2026-82035",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "PyMuPDF 1.28.2 Path Traversal via extract_objects() Font Branch",
"summary": "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.",
"evidence": "osv:CVE-2026-82035",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-82035",
"aliases": [
"CVE-2026-82035"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
}
],
"affected": [
{
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"repo": "https://github.com/pymupdf/pymupdf",
"type": "GIT",
"events": [
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},
{
"fixed": "b2c8f3a"
},
{
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}
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"source": "DESCRIPTION"
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{
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],
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},
{
"range": [
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"source": "DESCRIPTION"
},
{
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"source": "REFERENCES_COMMIT"
}
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-82035.json"
}
}
],
"modified": "2026-10-28T02:30:42.113979196Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82035.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-82035",
"https://www.vulncheck.com/advisories/pymupdf-path-traversal-via-extract-objects-font-branch",
"https://github.com/pymupdf/PyMuPDF/commit/b2c8f3a859fed35c379a44df566f770dc3e18605",
"https://github.com/pymupdf/PyMuPDF"
],
"provider_metadata": {
"cwe_ids": [
"CWE-22"
],
"cna_assigner": "VulnCheck",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"last_affected": "1.8.2"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82035.json"
}
},
"related_cves": [
{
"value": "CVE-2026-82035",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 510012,
"published_at": "2026-09-14T18:38:34.837+00:00"
}