Detections
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CVE-2026-123274
critical
Description
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.
References
https://lists.apache.org/thread/t4rngyg9cbv1b42f1d0crgpgtpby0594
https://github.com/apache/datasketches-cpp/releases/tag/5.3.1
https://github.com/apache/datasketches-cpp/pull/568
https://github.com/apache/datasketches-cpp/commit/bb86d439db494e3d362e54cc4f83481893974335