{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5d43b8cf9c45335ffd47e616bfa27648f17d0b63"
            }
          ],
          "repo": "https://github.com/sumatrapdfreader/sumatrapdf",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-753j-hx3p-xm9g"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107731.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "last_affected": "3.7.0.22298"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "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.",
  "id": "CVE-2026-107731",
  "modified": "2026-10-11T02:31:01.712970529Z",
  "published": "2026-10-08T22:20:36.456Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107731.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-753j-hx3p-xm9g"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-107731"
    },
    {
      "type": "FIX",
      "url": "https://github.com/sumatrapdfreader/sumatrapdf/commit/5d43b8cf9c45335ffd47e616bfa27648f17d0b63"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "SumatraPDF: LIT parser range-validation flaws cause invalid-pointer reads and denial of service"
}