{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-103635", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-09-30T23:50:17.136Z", "datePublished": "2026-10-10T10:23:48.598Z", "dateUpdated": "2026-10-10T10:23:48.598Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-10-10T10:23:48.598Z"}, "title": "Apache DataSketches: datasketches-cpp: Out-of-bounds read in compact Theta sketch deserialization allows denial of service via a crafted sketch", "problemTypes": [{"descriptions": [{"description": "CWE-125 Out-of-bounds read", "lang": "en", "cweId": "CWE-125", "type": "CWE"}]}, {"descriptions": [{"description": "CWE-190 Integer overflow or wraparound", "lang": "en", "cweId": "CWE-190", "type": "CWE"}]}], "source": {"discovery": "EXTERNAL"}, "affected": [{"vendor": "Apache Software Foundation", "product": "Apache DataSketches", "packageURL": "pkg:github/apache/datasketches-cpp", "versions": [{"status": "affected", "version": "3.1.0", "lessThanOrEqual": "5.2.0", "versionType": "semver"}], "defaultStatus": "unaffected", "collectionURL": "https://github.com", "packageName": "apache/datasketches-cpp"}], "descriptions": [{"value": "Out-of-bounds read in the compact Theta sketch deserialization of Apache DataSketches C++ (repo: datasketches-cpp).\n\ncompact_theta_sketch::deserialize() and wrapped_compact_theta_sketch::wrap() read header fields before checking that the input was long enough. For the compressed format, the size check could be defeated by a 32-bit overflow, and two header fields that control decoding were not validated; this also affected deserialization from a stream. A crafted or truncated sketch could cause a read past the end of the input. In the compressed case the over-read can be large, and the bytes read can become part of the deserialized sketch. This can cause a crash (denial of service) and could expose adjacent memory contents.\n\nThis issue affects Apache DataSketches C++: from 3.1.0 before 5.3.0. Only applications that deserialize Theta sketches from untrusted sources are affected.\n\nUsers are recommended to upgrade to version 5.3.0, which fixes this issue.", "lang": "en", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Out-of-bounds read in the compact Theta sketch deserialization of Apache DataSketches C++ (repo: datasketches-cpp).<br><br>compact_theta_sketch::deserialize() and wrapped_compact_theta_sketch::wrap() read header fields before checking that the input was long enough. For the compressed format, the size check could be defeated by a 32-bit overflow, and two header fields that control decoding were not validated; this also affected deserialization from a stream. A crafted or truncated sketch could cause a read past the end of the input. In the compressed case the over-read can be large, and the bytes read can become part of the deserialized sketch. This can cause a crash (denial of service) and could expose adjacent memory contents.<br><br>This issue affects Apache DataSketches C++: from 3.1.0 before 5.3.0. Only applications that deserialize Theta sketches from untrusted sources are affected.<br><br>Users are recommended to upgrade to version 5.3.0, which fixes this issue."}]}], "references": [{"url": "https://lists.apache.org/thread/15b86y9jstco39kzppjw7l5kvhjvwqvv", "tags": ["vendor-advisory"]}, {"url": "https://github.com/apache/datasketches-cpp/releases/tag/5.3.0", "tags": ["release-notes"]}], "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "low"}}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "credits": [{"lang": "en", "value": "He Huang", "type": "finder"}, {"lang": "en", "value": "NexusSan", "type": "tool"}], "x_generator": {"engine": "Vulnogram 1.0.3"}}}}

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