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Vulnerability DatabaseCVE-2026-23951
CVE-2026-23951:
SumatraPDF vulnerability analysis and mitigation
SumatraPDF is a multi-format reader for Windows. All versions contain an off-by-one error in the validation code that only triggers with exactly 2 records, causing an integer underflow in the size calculation. This bug exists in PalmDbReader::GetRecord when opening a crafted Mobi file, resulting in an out-of-bounds heap read that crashes the app. There are no published fixes at the time of publication.
Source: NVD
Related SumatraPDF vulnerabilities:
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