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CVE-2026-25920

nvd nist
Published: Feb 9, 2026Modified: Feb 20, 2026

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5.5
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Exploitability: 1.8 / Impact: 3.6
Source: security-advisories@github.com (Secondary)

Description

SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, a heap out-of-bounds read vulnerability exists in SumatraPDF's MOBI HuffDic decompressor. The bounds check in AddCdicData() only validates half the range that DecodeOne() actually accesses. Opening a crafted .mobi file can read nearly (1 << codeLength) bytes beyond the CDIC dictionary buffer, leading to a crash.

Affected (1)

Sumatrapdfreader
1 product
Sumatrapdf
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Sumatrapdf
Up to 3.5.2

Related CWEs

CWE-125
Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.

References (3)

Source: security-advisories@github.com
Product
Source: security-advisories@github.com
Product
Source: security-advisories@github.com
ExploitVendor Advisory

Timeline

No history available yet.