Severity: moderate Affected versions:
- Apache DataSketches C++ 2.0.0-incubating through 5.3.0 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. Credit: hataehoon (reporter) References: https://datasketches.apache.org https://www.cve.org/CVERecord?id=CVE-2026-123274
