{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-123338", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-11-05T18:41:24.720Z", "datePublished": "2026-11-13T10:32:43.404Z", "dateUpdated": "2026-11-13T10:32:43.404Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-11-13T10:32:43.404Z"}, "title": "Apache DataSketches C++: Out-of-bounds write in REQ sketch deserialization allows memory corruption via a crafted sketch", "problemTypes": [{"descriptions": [{"description": "CWE-787, Out-of-bounds Write", "lang": "en", "cweId": "CWE-787", "type": "CWE"}]}], "source": {"discovery": "INTERNAL"}, "affected": [{"vendor": "Apache Software Foundation", "product": "Apache DataSketches C++", "packageURL": "pkg:github/apache/datasketches-cpp", "versions": [{"status": "affected", "version": "3.0.0", "lessThanOrEqual": "5.3.0", "versionType": "semver"}], "defaultStatus": "unaffected", "collectionURL": "https://github.com", "packageName": "apache/datasketches-cpp"}], "descriptions": [{"value": "Out-of-bounds Write vulnerability in Apache DataSketches C++. An\n application that deserializes a REQ sketch from an untrusted source\n can have heap memory corrupted by a crafted sketch, because the\n serialized compactor headers were not validated.\n\n This issue affects Apache DataSketches C++: from 3.0.0 through 5.3.0.\n\n Users are recommended to upgrade to version 5.3.1, which fixes the\n issue.", "lang": "en", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Out-of-bounds Write vulnerability in Apache DataSketches C++. An<br> application that deserializes a REQ sketch from an untrusted source<br> can have heap memory corrupted by a crafted sketch, because the<br> serialized compactor headers were not validated.<br><br> This issue affects Apache DataSketches C++: from 3.0.0 through 5.3.0.<br><br> Users are recommended to upgrade to version 5.3.1, which fixes the<br> issue."}]}], "references": [{"url": "https://lists.apache.org/thread/wjsso4wl0f0nczwh7gd74kc5wckn1635", "tags": ["vendor-advisory"]}, {"url": "https://github.com/apache/datasketches-cpp/releases/tag/5.3.1", "tags": ["release-notes"]}, {"url": "https://github.com/apache/datasketches-cpp/commit/9839ffd2ccc038d453e38b545750a5ed2d589dea", "tags": ["patch"]}, {"url": "https://github.com/apache/datasketches-cpp/pull/568", "tags": ["patch"]}], "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "moderate"}}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "x_generator": {"engine": "Vulnogram 1.0.3"}}}}

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