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CVE-2026-66046: Inefficient Algorithmic Complexity in libexpat project libexpatCVE-2026-66046
0

CVE-2026-66046 is a denial of service vulnerability in libexpat versions up to 2.8.3 caused by a quadratic algorithmic complexity in the storeAtts() function. An unauthenticated remote attacker can supply a crafted XML document that triggers excessive CPU consumption due to inefficient processing of attributes, leading to denial of service without requiring special parser options or external entity resolution.

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CVE-2026-72522: CWE-125 Out-of-bounds Read in libexpat project libexpatCVE-2026-72522
0

libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the *_toUtf16 functions.

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