CVE-2026-107734

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Source

https://cve.org/CVERecord?id=CVE-2026-107734

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107734.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-107734

Aliases

GHSA-jf4v-rw66-j4w2

Published

2026-10-08T22:24:23Z

Modified

2026-10-28T10:41:06Z

Severity

7.1 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

SumatraPDF: SyncTeX Argument Injection in Inverse Search Enables Arbitrary Command Execution via External Editors

Details

SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, an attacker-controlled SyncTeX source filename is substituted for the %f placeholder in an external editor command line without safe Windows argument quoting, and the resulting command line is passed to CreateProcessW(). A user with an external editor configured or auto-detected who opens a PDF with a crafted .synctex.gz file and invokes inverse search can inject command-line flags; the resulting impact depends on the target editor interpreting those flags and can include unintended editor actions or code execution through a malicious extension. 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-20",
        "CWE-88"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107734.json"
}

References

Affected packages

Git / github.com/sumatrapdfreader/sumatrapdf

Affected ranges

Type

GIT

Repo

https://github.com/sumatrapdfreader/sumatrapdf

Events

Introduced

Fixed

398d23624362c60722d9709173a287ea53545b3b

Database specific

Show details

{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "last_affected":  "3.5.2"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "398d23624362c60722d9709173a287ea53545b3b"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

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-2026-107734.json"

vanir_signatures

[
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "147797068263823284444083557914968976149",
            "length":  1507
        },
        "id":  "CVE-2026-107734-449bc743",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/sumatrapdfreader/sumatrapdf/commit/398d23624362c60722d9709173a287ea53545b3b",
        "target":  {
            "file":  "src/PdfSync.cpp",
            "function":  "SyncTex::DocToSource"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
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            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-107734-595a91d4",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/sumatrapdfreader/sumatrapdf/commit/398d23624362c60722d9709173a287ea53545b3b",
        "target":  {
            "file":  "src/PdfSync.cpp"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
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            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-107734-9b81c0f6",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/sumatrapdfreader/sumatrapdf/commit/398d23624362c60722d9709173a287ea53545b3b",
        "target":  {
            "file":  "src/SearchAndDDE.cpp"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "279007402742875351443035413393742303869",
            "length":  894
        },
        "id":  "CVE-2026-107734-a4362e3e",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/sumatrapdfreader/sumatrapdf/commit/398d23624362c60722d9709173a287ea53545b3b",
        "target":  {
            "file":  "src/SearchAndDDE.cpp",
            "function":  "BuildOpenFileCmdTemp"
        }
    }
]

vanir_signatures_modified

"2026-10-28T10:41:06Z"