CVE-2026-103636

Out-of-bounds read in the VarOpt union deserialization of Apache DataSketches C++ repo: datasketches-cpp. varoptunion::deserialize read the 32-byte preamble of a non-empty union after checking that only 8 bytes were available, so a truncated serialized union could cause a read of up to 24 bytes...

CVE-2026-103513

Out-of-bounds read and write in the CPC sketch deserialization of Apache DataSketches C++ repo: datasketches-cpp. A crafted serialized CPC sketch passed to cpcsketch::deserialize, from either a byte buffer or a stream, can cause the decompressor to read past the end of the compressed data, becaus...

CVE-2026-103635

Out-of-bounds read in the compact Theta sketch deserialization of Apache DataSketches C++ repo: datasketches-cpp. compactthetasketch::deserialize and wrappedcompactthetasketch::wrap read header fields before checking that the input was long enough. For the compressed format, the size check could ...

CVE-2026-103501

Heap buffer overflow in the HLL sketch deserialization of Apache DataSketches C++ repo: datasketches-cpp. When deserializing a sketch in LIST mode, from either a byte buffer or a stream, the coupon count was read from the input and used as the number of entries to copy into a fixed buffer of 8...

CVE-2026-103636

The Apache DataSketches C++ library (repo: datasketches-cpp ) contains an out-of-bounds read vulnerability in the VarOpt union deserialization function. The var_opt_union::deserialize() function fails to properly validate the preamble of a non-empty union, potentially reading up to 24 bytes past ...

EUVD-2026-96309

Out-of-bounds read in the VarOpt union deserialization of Apache DataSketches C++ repo: datasketches-cpp. varoptunion::deserialize read the 32-byte preamble of a non-empty union after checking that only 8 bytes were available, so a truncated serialized union could cause a read of up to 24 bytes...

CVE-2026-103636 Apache DataSketches: datasketches-cpp: Out-of-bounds read in VarOpt union deserialization allows denial of service via a truncated sketch

Out-of-bounds read in the VarOpt union deserialization of Apache DataSketches C++ repo: datasketches-cpp. varoptunion::deserialize read the 32-byte preamble of a non-empty union after checking that only 8 bytes were available, so a truncated serialized union could cause a read of up to 24 bytes...

CVE-2026-103635

The Apache DataSketches C++ library (repo: datasketches-cpp ) is vulnerable to an out-of-bounds read during the deserialization of compact Theta sketches . Specifically, the compact_theta_sketch::deserialize() and wrapped_compact_theta_sketch::wrap() functions read header fields without first ver...

EUVD-2026-96308

Out-of-bounds read in the compact Theta sketch deserialization of Apache DataSketches C++ repo: datasketches-cpp. compactthetasketch::deserialize and wrappedcompactthetasketch::wrap read header fields before checking that the input was long enough. For the compressed format, the size check could ...

CVE-2026-103635 Apache DataSketches: datasketches-cpp: Out-of-bounds read in compact Theta sketch deserialization allows denial of service via a crafted sketch

Out-of-bounds read in the compact Theta sketch deserialization of Apache DataSketches C++ repo: datasketches-cpp. compactthetasketch::deserialize and wrappedcompactthetasketch::wrap read header fields before checking that the input was long enough. For the compressed format, the size check could ...

CVE-2026-103513

The Apache DataSketches C++ library (repository: datasketches-cpp ) is vulnerable to out-of-bounds read and write during CPC sketch deserialization. The root cause is a failure to validate the read position during decoding and a lack of validation for decoded row indices and header fields (includ...

EUVD-2026-96307

Out-of-bounds read and write in the CPC sketch deserialization of Apache DataSketches C++ repo: datasketches-cpp. A crafted serialized CPC sketch passed to cpcsketch::deserialize, from either a byte buffer or a stream, can cause the decompressor to read past the end of the compressed data, becaus...

CVE-2026-103513 Apache DataSketches: datasketches-cpp: Out-of-bounds read and write in the CPC sketch deserialization allows memory corruption via a crafted sketch

Out-of-bounds read and write in the CPC sketch deserialization of Apache DataSketches C++ repo: datasketches-cpp. A crafted serialized CPC sketch passed to cpcsketch::deserialize, from either a byte buffer or a stream, can cause the decompressor to read past the end of the compressed data, becaus...

CVE-2026-103501

A heap buffer overflow exists in the HLL sketch deserialization of Apache DataSketches C++ (repo: datasketches-cpp). When deserializing a sketch in LIST mode from a byte buffer or stream, the software fails to validate the input coupon count against a fixed internal buffer capacity of 8 entries. ...

EUVD-2026-96306

Heap buffer overflow in the HLL sketch deserialization of Apache DataSketches C++ repo: datasketches-cpp. When deserializing a sketch in LIST mode, from either a byte buffer or a stream, the coupon count was read from the input and used as the number of entries to copy into a fixed buffer of 8...

CVE-2026-103501 Apache DataSketches: datasketches-cpp: HLL CouponList Deserialization Buffer Overflow allows memory corruption via a crafted sketch

Heap buffer overflow in the HLL sketch deserialization of Apache DataSketches C++ repo: datasketches-cpp. When deserializing a sketch in LIST mode, from either a byte buffer or a stream, the coupon count was read from the input and used as the number of entries to copy into a fixed buffer of 8...