Unrated

DEBIAN-CVE-2026-82035

Type: advisorySource: OSV1 source record

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.

Announced 14 Sept 2026Group revision 1

Original source ↗

DEBIAN-CVE-2026-82035

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-82035

pymupdf

Source reference: /affected/0/package/name

Affected versions: 1.21.1+ds1-1
Source reference: /affected/0/versions
1.22.5+ds1-1
Source reference: /affected/0/versions
1.23.7+ds1-1
Source reference: /affected/0/versions
1.24.2+ds1-1
Source reference: /affected/0/versions
1.24.2+ds1-2
Source reference: /affected/0/versions
1.24.2+ds1-3
Source reference: /affected/0/versions
1.25.0+ds1-1
Source reference: /affected/0/versions
1.25.0+ds1-2
Source reference: /affected/0/versions
1.25.4+ds1-1
Source reference: /affected/0/versions
1.25.4+ds1-2
Source reference: /affected/0/versions
1.25.4+ds1-3
Source reference: /affected/0/versions
1.25.4+ds1-4
Source reference: /affected/0/versions
1.26.7+ds1-1
Source reference: /affected/0/versions
1.28.2+ds1-1
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

pymupdf

Source reference: /affected/1/package/name

Affected versions: 1.25.4+ds1-3
Source reference: /affected/1/versions
1.25.4+ds1-3+deb13u1
Source reference: /affected/1/versions
1.25.4+ds1-4
Source reference: /affected/1/versions
1.26.7+ds1-1
Source reference: /affected/1/versions
1.28.2+ds1-1
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

pymupdf

Source reference: /affected/2/package/name

Affected versions: 1.25.4+ds1-3
Source reference: /affected/2/versions
1.25.4+ds1-4
Source reference: /affected/2/versions
1.26.7+ds1-1
Source reference: /affected/2/versions
1.28.2+ds1-1
Source reference: /affected/2/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "pymupdf",
      "purl": "pkg:deb/debian/pymupdf?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "1.21.1+ds1-1",
      "1.22.5+ds1-1",
      "1.23.7+ds1-1",
      "1.24.2+ds1-1",
      "1.24.2+ds1-2",
      "1.24.2+ds1-3",
      "1.25.0+ds1-1",
      "1.25.0+ds1-2",
      "1.25.4+ds1-1",
      "1.25.4+ds1-2",
      "1.25.4+ds1-3",
      "1.25.4+ds1-4",
      "1.26.7+ds1-1",
      "1.28.2+ds1-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82035.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "pymupdf",
      "purl": "pkg:deb/debian/pymupdf?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "1.25.4+ds1-3",
      "1.25.4+ds1-3+deb13u1",
      "1.25.4+ds1-4",
      "1.26.7+ds1-1",
      "1.28.2+ds1-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82035.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "pymupdf",
      "purl": "pkg:deb/debian/pymupdf?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "1.25.4+ds1-3",
      "1.25.4+ds1-4",
      "1.26.7+ds1-1",
      "1.28.2+ds1-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82035.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #15021 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 00:51:56 GMT
Publisher date: Mon, 14 Sep 2026 19:17:50 GMT

Read the original announcement

Revision history

25 Oct 2026DEBIAN-CVE-2026-82035 · Revision 1Source updated