Detections
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CVE-2026-123338
critical
Description
Out-of-bounds Write vulnerability in Apache DataSketches C++. An application that deserializes a REQ sketch from an untrusted source can have heap memory corrupted by a crafted sketch, because the serialized compactor headers were not validated. This issue affects Apache DataSketches C++: from 3.0.0 through 5.3.0. Users are recommended to upgrade to version 5.3.1, which fixes the issue.
References
https://lists.apache.org/thread/wjsso4wl0f0nczwh7gd74kc5wckn1635
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/9839ffd2ccc038d453e38b545750a5ed2d589dea