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CVE-2026-23951

PoC —
CVSS 3.1
5.5 medium
EPSS
<1%p11
Published
()
Modified
Description

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.

Vendors
sumatrapdfreader
Products
sumatrapdf
Weakness
CWE-125, CWE-191, CWE-193
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD CVE.org GitHub PoCs EPSS (0.2%)

In the news

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