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        "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": "2026-10-16T15:28:02.277Z"
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            "title": "Apache DataSketches: datasketches-cpp: Out-of-bounds read in compact Theta sketch deserialization allows denial of service via a crafted sketch",
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                            "description": "CWE-125 Out-of-bounds read",
                            "lang": "en",
                            "cweId": "CWE-125",
                            "type": "CWE"
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                            "description": "CWE-190 Integer overflow or wraparound",
                            "lang": "en",
                            "cweId": "CWE-190",
                            "type": "CWE"
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            "source": {
                "discovery": "EXTERNAL"
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            "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",
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                    "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.",
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            "references": [
                {
                    "url": "https://lists.apache.org/thread/15b86y9jstco39kzppjw7l5kvhjvwqvv",
                    "tags": [
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                    ]
                },
                {
                    "url": "https://github.com/apache/datasketches-cpp/releases/tag/5.3.0",
                    "tags": [
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                            "value": "GENERAL"
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                    "value": "He Huang",
                    "type": "finder"
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                        "url": "http://www.openwall.com/lists/oss-security/2026/10/10/5"
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                            "version": "3.1",
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                            "baseSeverity": "CRITICAL",
                            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                            "integrityImpact": "NONE",
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                            "attackComplexity": "LOW",
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                            "privilegesRequired": "NONE",
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                            "content": {
                                "timestamp": "2026-10-16T15:27:43.270802Z",
                                "id": "CVE-2026-103635",
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