CVE-2026-25920 – SumatraPDF has a heap out-of-bounds read in MOBI HuffDic decompressor

CVE ID : CVE-2026-25920

Published : Feb. 9, 2026, 9:32 p.m. | 49 minutes ago

Description : SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, tA 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
Severity: 0.0 | NA

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