CVE-2026-123338
Apache DataSketches C++: Out-of-bounds write in REQ sketch deserialization allows memory corruption via a crafted sketch
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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: apacheFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: apacheAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Apache DataSketches C++ Apache Software Foundation apache/datasketches-cpp
github |
≥ 3.0.0; ≤ 5.3.0 (affected, semver)
Other versions: unaffected |
CNA: apache |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://lists.apache.org/thread/wjsso4wl0f0nczwh7gd74kc5wckn1635CNA: apache · vendor-advisory
- https://github.com/apache/datasketches-cpp/releases/tag/5.3.1CNA: apache · release-notes
- https://github.com/apache/datasketches-cpp/commit/9839ffd2ccc038d453e38b545750a5ed2d589deaCNA: apache · patch
- https://github.com/apache/datasketches-cpp/pull/568CNA: apache · patch
- http://www.openwall.com/lists/oss-security/2026/11/13/2ADP: CVE
- https://github.com/apache/datasketches-cpp/commit/9839ffd2ccc038d453e38b545750a5ed2d589dea[email protected]
- https://github.com/apache/datasketches-cpp/pull/568[email protected]
- https://github.com/apache/datasketches-cpp/releases/tag/5.3.1[email protected]
- https://lists.apache.org/thread/wjsso4wl0f0nczwh7gd74kc5wckn1635[email protected]
- http://www.openwall.com/lists/oss-security/2026/11/13/2af854a3a-2127-422b-91ae-364da2661108
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