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.

Database specific

{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82035.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "last_affected": "1.8.2"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}

References

Affected packages

Git / github.com/pymupdf/pymupdf

Affected ranges

Type

GIT

Repo

https://github.com/pymupdf/pymupdf

Events

Introduced

Fixed

12786d12b2962a1d77fd13b103162eddf749644c

Fixed

b2c8f3a859fed35c379a44df566f770dc3e18605

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.28.2"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

1.*

1.12.4

1.13.10

1.13.11

1.13.12

1.13.13

1.13.14

1.13.15

1.13.16

1.13.17

1.13.18

1.13.19

1.13.20

1.13.3

1.13.4

1.13.5

1.13.7

1.13.8

1.13.9

1.14.0

1.14.1

1.14.10

1.14.11

1.14.12

1.14.13

1.14.14

1.14.15

1.14.16

1.14.17

1.14.18

1.14.19

1.14.20

1.14.3

1.14.5

1.14.6

1.14.7

1.14.8

1.14.9

1.16.0

1.16.1

1.16.10

1.16.11

1.16.12

1.16.13

1.16.14

1.16.16

1.16.17

1.16.18

1.16.2

1.16.3

1.16.4

1.16.5

1.16.6

1.16.7

1.16.8

1.16.9

1.17.0

1.17.1

1.17.2

1.17.3

1.17.4

1.17.5

1.17.6

1.17.7

1.18.0

1.18.1

1.18.10

1.18.11

1.18.13

1.18.14

1.18.15

1.18.16

1.18.17

1.18.18

1.18.19

1.18.2

1.18.3

1.18.4

1.18.5

1.18.6

1.18.7

1.18.8

1.18.9

1.19.0

1.19.1

1.19.2

1.19.3

1.19.4

1.19.5

1.19.6

1.20.0

1.20.0rc1

1.20.0rc2

1.20.1

1.20.2

1.21.0

1.21.0rc1

1.21.0rc2

1.21.1

1.21.1rc1

1.22.0

1.22.1

1.22.2

1.22.3

1.22.5

1.23.0

1.23.0rc1

1.23.0rc2_b

1.23.1

1.23.10

1.23.11

1.23.12

1.23.13

1.23.14

1.23.15

1.23.16

1.23.17

1.23.18

1.23.19

1.23.2

1.23.20

1.23.21

1.23.22

1.23.23

1.23.24

1.23.25

1.23.26

1.23.3

1.23.4

1.23.5

1.23.6

1.23.7

1.23.8

1.23.9

1.23.9rc1

1.23.9rc2

1.24.0

1.24.1

1.24.10

1.24.11

1.24.12

1.24.13

1.24.14

1.24.2

1.24.3

1.24.4

1.24.5

1.24.6

1.24.7

1.24.8

1.24.9

1.25.0

1.25.1

1.25.2

1.25.3

1.25.4

1.25.5

1.26.0

1.26.1

1.26.3

1.26.4

1.26.5

1.26.6

1.26.7

1.27.1

1.27.2

1.27.2.2

1.27.2.3

1.28.0

1.28.2

internal-rf2.*

internal-rf2.4.1

v1.*

v1.12.4

v1.12.5

v1.12.6

v1.2

v1.7

v1.8

v1.9

v1.9.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-82035.json"