CVE-2026-107733

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Source

https://cve.org/CVERecord?id=CVE-2026-107733

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107733.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-107733

Aliases

GHSA-p2ph-2rvm-q37m

Published

2026-10-08T22:23:26Z

Modified

2026-10-10T07:06:11Z

Severity

6.8 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

SumatraPDF: Null-pointer dereference in `CmdExec` when no document tab is open

Details

SumatraPDF is a multi-format reader for Windows. In 3.6.1 and earlier, FrameOnCommand() handles CmdExec by passing a null current-tab pointer to RunWithExe(), which dereferences WindowTab::filePath. A local process in the same interactive Windows session, at an integrity level greater than or equal to SumatraPDF's under Windows UIPI, can dispatch CmdExec over DDE or WM_COPYDATA while no document tab is open, causing abrupt process termination and loss of unsaved state. No broader impact is claimed beyond the advisory-supported conditions. No fixed version is available as of this review.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-476"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107733.json"
}

References

Affected packages

Git / github.com/sumatrapdfreader/sumatrapdf

Affected ranges

Type

GIT

Repo

https://github.com/sumatrapdfreader/sumatrapdf

Events

Introduced

Fixed

013ad659c7de13fa15624d1f8a24e3231c50516b

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "3.6.1"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

1.*

1.4split

1.5split

1.6split

1.7split

1.8split

1.9split

2.*

2.0split

2.1split

2.2split

2.3split

2.4split

2.5split

3.*

3.0split

3.1.2rel

3.2

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107733.json"

vanir_signatures

[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "336693156641971694908676563921213315562",
                "233395195509926029878878160758518824231",
                "308004880397224888027993565521016301582",
                "30386380623293840263648443392029126773"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-107733-50a6beba",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/sumatrapdfreader/sumatrapdf/commit/013ad659c7de13fa15624d1f8a24e3231c50516b",
        "target": {
            "file": "src/ExternalViewers.cpp"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "121868125225294072948265101337101149091",
            "length": 721
        },
        "id": "CVE-2026-107733-922d631f",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/sumatrapdfreader/sumatrapdf/commit/013ad659c7de13fa15624d1f8a24e3231c50516b",
        "target": {
            "file": "src/ExternalViewers.cpp",
            "function": "RunWithExe"
        }
    }
]

vanir_signatures_modified

"2026-10-10T07:06:11Z"