{"id":"CVE-2026-123274","aliases":["EUVD-2026-125275","GHSA-v92m-x8fp-25xm"],"status":"published","title":"Apache DataSketches C++: Out-of-bounds write in KLL sketch deserialization allows memory corruption via a crafted sketch","description":"Out-of-bounds Write vulnerability in Apache DataSketches C++. An\n  application that deserializes a KLL sketch from an untrusted source\n  can have heap memory corrupted by a crafted sketch, because the\n  serialized level boundaries were not validated.\n\n  This issue affects Apache DataSketches C++: 2.0.0 through 5.3.0.\n\n  Users are recommended to upgrade to version 5.3.1, which fixes the\n  issue.","epss":{"day":"2026-11-14","score":0.00228,"percentile":0.13651,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2026-11-13T10:34:29Z","modified":"2026-11-14T02:46:22Z","products":[{"vendor":"apache software foundation","product":"apache datasketches c++"}],"references":[{"url":"https://lists.apache.org/thread/t4rngyg9cbv1b42f1d0crgpgtpby0594","tags":["vendor-advisory","advisory"]},{"url":"https://github.com/apache/datasketches-cpp/releases/tag/5.3.1","tags":["release-notes","advisory"]},{"url":"https://github.com/apache/datasketches-cpp/commit/bb86d439db494e3d362e54cc4f83481893974335","tags":["patch","fix"]},{"url":"https://github.com/apache/datasketches-cpp/pull/568","tags":["patch","fix"]},{"url":"http://www.openwall.com/lists/oss-security/2026/11/13/1","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123274","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-v92m-x8fp-25xm"},{"url":"https://github.com","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123274.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-123274","title":"Apache DataSketches C++: Out-of-bounds write in KLL sketch deserialization allows memory corruption via a crafted sketch","description":"Out-of-bounds Write vulnerability in Apache DataSketches C++. An\n  application that deserializes a KLL sketch from an untrusted source\n  can have heap memory corrupted by a crafted sketch, because the\n  serialized level boundaries were not validated.\n\n  This issue affects Apache DataSketches C++: 2.0.0 through 5.3.0.\n\n  Users are recommended to upgrade to version 5.3.1, which fixes the\n  issue.","status":"published","published":"2026-11-13T10:34:29.123Z","modified":"2026-11-13T11:07:40.219Z","cwes":["CWE-787"],"updated_at":"2026-11-13T12:58:56.207135Z"}],"euvd":[{"id":"EUVD-2026-125275","description":"Out-of-bounds Write vulnerability in Apache DataSketches C++. An\n  application that deserializes a KLL sketch from an untrusted source\n  can have heap memory corrupted by a crafted sketch, because the\n  serialized level boundaries were not validated.\n\n  This issue affects Apache DataSketches C++: 2.0.0 through 5.3.0.\n\n  Users are recommended to upgrade to version 5.3.1, which fixes the\n  issue.","status":"published","published":"2026-11-13T10:34:29Z","modified":"2026-11-13T11:07:40Z","updated_at":"2026-11-13T14:38:51.246778Z"}],"ghsa":[{"id":"GHSA-v92m-x8fp-25xm","title":"Out-of-bounds Write vulnerability in Apache DataSketches C++. An\n  application that deserializes...","description":"Out-of-bounds Write vulnerability in Apache DataSketches C++. An\n  application that deserializes a KLL sketch from an untrusted source\n  can have heap memory corrupted by a crafted sketch, because the\n  serialized level boundaries were not validated.\n\n  This issue affects Apache DataSketches C++: 2.0.0 through 5.3.0.\n\n  Users are recommended to upgrade to version 5.3.1, which fixes the\n  issue.","status":"published","published":"2026-11-13T12:31:45Z","modified":"2026-11-13T12:31:53Z","cwes":["CWE-787"],"updated_at":"2026-11-13T12:50:18.307659Z"}],"nvd":[{"id":"CVE-2026-123274","description":"Out-of-bounds Write vulnerability in Apache DataSketches C++. An\n  application that deserializes a KLL sketch from an untrusted source\n  can have heap memory corrupted by a crafted sketch, because the\n  serialized level boundaries were not validated.\n\n  This issue affects Apache DataSketches C++: 2.0.0 through 5.3.0.\n\n  Users are recommended to upgrade to version 5.3.1, which fixes the\n  issue.","status":"published","published":"2026-11-13T11:17:16.127Z","modified":"2026-11-13T11:17:16.127Z","cwes":["CWE-787"],"updated_at":"2026-11-13T13:36:02.303552Z"}],"osv":[{"id":"CVE-2026-123274","title":"Apache DataSketches C++: Out-of-bounds write in KLL sketch deserialization allows memory corruption via a crafted sketch","description":"Out-of-bounds Write vulnerability in Apache DataSketches C++. An\n  application that deserializes a KLL sketch from an untrusted source\n  can have heap memory corrupted by a crafted sketch, because the\n  serialized level boundaries were not validated.\n\n  This issue affects Apache DataSketches C++: 2.0.0 through 5.3.0.\n\n  Users are recommended to upgrade to version 5.3.1, which fixes the\n  issue.","status":"published","published":"2026-11-13T10:34:29.123Z","modified":"2026-11-15T02:45:14.68205823Z","cwes":["CWE-787"],"updated_at":"2026-11-15T03:02:47.063532Z"}]}}