{"id":"CVE-2026-123338","aliases":["EUVD-2026-125274","GHSA-f29r-h9w7-gp62"],"status":"published","title":"Apache DataSketches C++: Out-of-bounds write in REQ 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 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.","epss":{"day":"2026-11-14","score":0.00228,"percentile":0.13652,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2026-11-13T10:32:43Z","modified":"2026-11-14T02:46:34Z","products":[{"vendor":"apache software foundation","product":"apache datasketches c++"}],"references":[{"url":"https://lists.apache.org/thread/wjsso4wl0f0nczwh7gd74kc5wckn1635","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/9839ffd2ccc038d453e38b545750a5ed2d589dea","tags":["patch","fix"]},{"url":"https://github.com/apache/datasketches-cpp/pull/568","tags":["patch","fix"]},{"url":"http://www.openwall.com/lists/oss-security/2026/11/13/2","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123338","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-f29r-h9w7-gp62"},{"url":"https://github.com","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123338.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-123338","title":"Apache DataSketches C++: Out-of-bounds write in REQ 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 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.","status":"published","published":"2026-11-13T10:32:43.404Z","modified":"2026-11-13T11:07:42.27Z","cwes":["CWE-787"],"updated_at":"2026-11-13T12:58:56.207135Z"}],"euvd":[{"id":"EUVD-2026-125274","description":"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.","status":"published","published":"2026-11-13T10:32:43Z","modified":"2026-11-13T11:07:42Z","updated_at":"2026-11-13T14:38:51.246778Z"}],"ghsa":[{"id":"GHSA-f29r-h9w7-gp62","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 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.","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-2026-123338","description":"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.","status":"published","published":"2026-11-13T11:17:16.273Z","modified":"2026-11-13T11:17:16.273Z","cwes":["CWE-787"],"updated_at":"2026-11-13T13:36:02.303552Z"}],"osv":[{"id":"CVE-2026-123338","title":"Apache DataSketches C++: Out-of-bounds write in REQ 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 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.","status":"published","published":"2026-11-13T10:32:43.404Z","modified":"2026-11-15T02:45:38.480590442Z","cwes":["CWE-787"],"updated_at":"2026-11-15T03:02:39.264057Z"}]}}