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Vulnerability DatabaseCVE-2026-25920
CVE-2026-25920:
SumatraPDF vulnerability analysis and mitigation
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.
Source: NVD
Related SumatraPDF vulnerabilities:
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