CVE-2026-123274
Apache DataSketches C++: Out-of-bounds write in KLL 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 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.
| 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++
1.0.0-incubating ≤ 5.3.0
References
lists.apache.org: https://lists.apache.org/thread/t4rngyg9cbv1b42f1d0crgpgtpby0594 github.com: https://github.com/apache/datasketches-cpp/releases/tag/5.3.1 github.com: https://github.com/apache/datasketches-cpp/commit/bb86d439db494e3d362e54cc4f83481893974335 github.com: https://github.com/apache/datasketches-cpp/pull/568 openwall.com: http://www.openwall.com/lists/oss-security/2026/11/13/1
Credits
🔍 hataehoon