CVE-2026-123338
Apache DataSketches C++: Out-of-bounds write in REQ sketch deserialization allows memory corruption via a crafted sketch
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-787 |
| Vendor | apache software foundation |
| Product | apache datasketches c++ |
| Published | Nov 13, 2026 |
| Last Updated | Nov 13, 2026 |
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Affected Versions
Apache Software Foundation / Apache DataSketches C++
3.0.0 ≤ 5.3.0
References
lists.apache.org: https://lists.apache.org/thread/wjsso4wl0f0nczwh7gd74kc5wckn1635 github.com: https://github.com/apache/datasketches-cpp/releases/tag/5.3.1 github.com: https://github.com/apache/datasketches-cpp/commit/9839ffd2ccc038d453e38b545750a5ed2d589dea github.com: https://github.com/apache/datasketches-cpp/pull/568 openwall.com: http://www.openwall.com/lists/oss-security/2026/11/13/2