{"id":"CVE-2026-107731","revision":"ffa5764689b0480e9ab2846b491740ad","records":[{"revision":"ffa5764689b0480e9ab2846b491740ad","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-107731","aliases":[],"title":"SumatraPDF: LIT parser range-validation flaws cause invalid-pointer reads and denial of service","description":"SumatraPDF is a multi-format reader for Windows. In 3.7.0.22298, four independently reachable range-validation variants in src/LitDoc.cpp allow file-controlled offsets and sizes to overflow, narrow to negative values, or wrap before incomplete bounds checks. The affected calculations include contentOffset, the directory expression dirOff64 + dirLen64, and the decoded-section offset + size, along with secondary-header range handling. Opening a crafted LIT file that reaches one of these variants can cause invalid pointer reads and deterministic application termination. No broader impact is claimed beyond the advisory-supported conditions. No fixed version is available as of this review.","state":0,"publishedAt":"2026-10-08T22:20:36.456+00:00","modifiedAt":"2026-10-09T15:12:44.556+00:00","affected":[{"ecosystem":"Vendor product","name":"sumatrapdf","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"sumatrapdfreader\",\n                    \"product\": \"sumatrapdf\",\n                    \"versions\": [\n                        {\n                            \"version\": \"<= 3.7.0.22298\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","score":5.5,"severity":"MEDIUM"}],"references":["https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-753j-hx3p-xm9g","https://github.com/sumatrapdfreader/sumatrapdf/commit/5d43b8cf9c45335ffd47e616bfa27648f17d0b63"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-107731","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-107731","identifiers":["CVE-2026-107731"]},"retained":false,"historicalAffected":[]}],"coverage":[]}