CVE-2026-107730: CWE-190: Integer Overflow or Wraparound in sumatrapdfreader sumatrapdf
Description
CVE-2026-107730 is an integer overflow vulnerability in SumatraPDF version 3.7.0.22298. The flaw occurs in the LitParseHeader() function where an attacker-controlled calculation using signed 32-bit arithmetic can overflow, leading to an invalid pointer read and deterministic application crash. There is no evidence of code execution, information disclosure, or other impacts beyond denial of service. No patch or fixed version is currently available.
CVSS v3.1
Score 5.5medium
Affected software
sumatrapdfreader
sumatrapdf
pkg:github/sumatrapdfreader/sumatrapdfRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
SumatraPDF 3.7.0.22298 contains an integer overflow vulnerability in the LitParseHeader() function located in src/LitDoc.cpp. The function calculates a section offset by adding hdrLen and nPieces * 16 using signed 32-bit arithmetic without validating the result. If the sum overflows to a negative value, it causes an invalid pointer dereference in LitU32(), resulting in a deterministic crash of the application. The vulnerability does not demonstrate any impact on confidentiality, integrity, or code execution.
Potential Impact
The vulnerability causes a denial of service through deterministic application termination due to an invalid read triggered by an integer overflow. There is no confirmed impact on confidentiality, integrity, or availability beyond application crash. No evidence exists for code execution or information disclosure.
Mitigation Recommendations
No fixed version or patch is currently available for this vulnerability. Users should monitor vendor advisories for updates. Until a fix is released, avoid processing untrusted or maliciously crafted PDF files that could trigger this overflow.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-08T17:21:52.976Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac81a5e2cdf04f6563e4cfb
Added to database: 10/08/2026, 22:34:06 UTC
Last enriched: 10/08/2026, 22:48:58 UTC
Last updated: 10/08/2026, 22:49:04 UTC
Views: 8
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