{"id":"CVE-2026-107734","revision":"31924488d0154622adc1032d413cb14a","records":[{"revision":"31924488d0154622adc1032d413cb14a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-107734","aliases":[],"title":"SumatraPDF: SyncTeX Argument Injection in Inverse Search Enables Arbitrary Command Execution via External Editors","description":"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.","state":0,"publishedAt":"2026-10-08T22:24:23.861+00:00","modifiedAt":"2026-10-09T15:44:18.411+00:00","affected":[{"ecosystem":"Vendor product","name":"sumatrapdf","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"sumatrapdfreader\",\n                    \"product\": \"sumatrapdf\",\n                    \"versions\": [\n                        {\n                            \"version\": \"<= 3.5.2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":7.1,"severity":"HIGH"}],"references":["https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-jf4v-rw66-j4w2","https://github.com/sumatrapdfreader/sumatrapdf/commit/398d23624362c60722d9709173a287ea53545b3b"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-107734","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-107734","identifiers":["CVE-2026-107734"]},"retained":false,"historicalAffected":[]}],"coverage":[]}