CVE-2026-103635

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Source

https://cve.org/CVERecord?id=CVE-2026-103635

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103635.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-103635

Published

2026-10-10T10:23:48Z

Modified

2026-10-28T02:30:31Z

Severity

9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H CVSS Calculator

Summary

Apache DataSketches: datasketches-cpp: Out-of-bounds read in compact Theta sketch deserialization allows denial of service via a crafted sketch

Details

Out-of-bounds read in the compact Theta sketch deserialization of Apache DataSketches C++ (repo: datasketches-cpp).

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.

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.

Users are recommended to upgrade to version 5.3.0, which fixes this issue.

Database specific

{
    "cna_assigner": "apache",
    "cwe_ids": [
        "CWE-125",
        "CWE-190"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103635.json"
}

References

Affected packages

Git / github.com/apache/datasketches-cpp

Affected ranges

Type

GIT

Repo

https://github.com/apache/datasketches-cpp

Events

Introduced

a375f9805ab8064b20e6a1b82282e4d04b102328

Fixed

5b5524f55d121225a7909c2851271327684585d7

Database specific

Show details

{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "3.1.0"
                },
                {
                    "last_affected": "5.2.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "original_tag": "5.3.0",
            "range": [
                {
                    "fixed": "5b5524f55d121225a7909c2851271327684585d7"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103635.json"