CVE-2026-25920

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.

PUBLISHED Reserved 2026-02-09 | Published 2026-02-09 | Updated 2026-02-11 | Assigner GitHub_M

Problem types

CWE-125: Out-of-bounds Read

Product status

References

github.com/...trapdf/security/advisories/GHSA-5mwx-65x7-cffp

github.com/...ommit/12b6887e9dfff874fe8749bab1bdc53d4ff075b3

github.com/...c34e24f3c3286893ac6d7fa1e1c428/src/MobiDoc.cpp

cve.org (CVE-2026-25920)

nvd.nist.gov (CVE-2026-25920)

Download JSON