{"schemaVersion":3,"id":"CVE-2026-107731","aliases":[],"status":"published","duplicateOf":null,"title":null,"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.","dates":{"published":"2026-10-08T22:20:36.456Z","modified":"2026-10-09T15:12:44.556Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00113,"percentile":0.01351,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-09T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00113,"percentile":0.01351}],"last30":[{"date":"2026-10-09T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00113,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00113,"percentile":0.01351}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-125","name":"Out-of-bounds Read","description":"The product reads data past the end, or before the beginning, of the intended buffer.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/125.html"}],"affected":[{"vendor":"sumatrapdfreader","product":"sumatrapdf","name":"sumatrapdf","label":"sumatrapdf","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 3.7.0.22298","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 3.7.0.22298","eol":null,"hubHref":"/vendor/sumatrapdfreader/sumatrapdf"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-753j-hx3p-xm9g","label":"github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-753j-hx3p-xm9g","hostname":"github.com","tags":["X Refsource CONFIRM"]},{"url":"https://github.com/sumatrapdfreader/sumatrapdf/commit/5d43b8cf9c45335ffd47e616bfa27648f17d0b63","label":"github.com/sumatrapdfreader/sumatrapdf/commit/5d43b8cf9c45335ffd47e616bfa27648f17d0b63","hostname":"github.com","tags":["X Refsource MISC"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-08T22:20:36.456Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-09T15:12:44.556Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":22,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T22:58:10.362Z","stale":false,"partial":false}}