{"schema":"threatline.record/2","record":{"id":"CVE-2026-107731","aliases":["GHSA-753j-hx3p-xm9g"],"summary":"SumatraPDF: LIT parser range-validation flaws cause invalid-pointer reads and denial of service","details":"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.","categories":["Unclassified"],"product":"sumatrapdf","vendor":"sumatrapdfreader","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-107731","source_modified_at":"2026-10-09T15:12:44.556Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"sumatrapdf","vendor":"sumatrapdfreader","versions":[{"version":"<= 3.7.0.22298","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":5.5,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00113,"percentile":0.01352,"score_date":"2026-10-23"},"published_at":"2026-10-08T22:20:36.456Z","modified_at":"2026-10-09T15:12:44.556Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-107731","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-09T15:12:44.556Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-107731","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-753j-hx3p-xm9g","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/sumatrapdfreader/sumatrapdf/commit/5d43b8cf9c45335ffd47e616bfa27648f17d0b63","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-09T14:54:56.572076Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-09T15:12:44.556Z","content_hash":"ca87d82c752ffe7e23d2477e4eeb2466ca4c6cb7e16a13411dee084642df2994"}}