APACHE DATASKETCHES C++ · CVE-2026-123274 · Package
NO FIX YET · SEE WHAT TO DO
Apache DataSketches C++ does not validate level boundaries when it deserializes a KLL sketch. A crafted sketch from an untrusted source can overwrite heap memory in the application that loads it.
first public Nov 13, 2026 · 1 source
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Applications that call the KLL sketch deserializer on data from an untrusted source are exposed. Applications that only build sketches locally or deserialize only data they produced are not exposed by this flaw. The sources do not describe further configuration.
Not affected if no-kll-deserialization, trusted-input-only
Who cares apache-datasketches, c++, data-processing
2.0.0 through 5.3.0.5.3.1.Out-of-bounds Write vulnerability in Apache DataSketches C++. An application that deserializes a KLL sketch from an untrusted source can have heap memory corrupted by a crafted sketch, because the serialized level boundaries were not validated.
This issue affects Apache DataSketches C++: 2.0.0 through 5.3.0.
Users are recommended to upgrade to version 5.3.1, which fixes the issue.
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.
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