CVE-2026-103501

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Source
https://cve.org/CVERecord?id=CVE-2026-103501
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103501.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-103501
Published
2026-10-10T10:22:55Z
Modified
2026-10-28T02:31:10Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
Apache DataSketches: datasketches-cpp: HLL CouponList Deserialization Buffer Overflow allows memory corruption via a crafted sketch
Details

Heap buffer overflow in the HLL sketch deserialization of Apache DataSketches C++ (repo: datasketches-cpp).

When deserializing a sketch in LIST mode, from either a byte buffer or a stream, the coupon count was read from the input and used as the number of entries to copy into a fixed buffer of 8 entries, without checking it against the buffer's capacity. A crafted sketch could cause a write of up to 988 bytes past the end of this internal heap buffer. This can corrupt heap memory, causing a crash and potentially enabling further exploitation.

This issue affects Apache DataSketches C++: from 1.0.0-incubating before 5.3.0. Only applications that deserialize HLL 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-122",
        "CWE-1284"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103501.json"
}
References

Affected packages

Git / github.com/apache/datasketches-cpp

Affected ranges

Type
GIT
Repo
https://github.com/apache/datasketches-cpp
Events
Introduced
fa481e2c0b8dd2e3d6a389338168b930e3e6698d
Fixed
5b5524f55d121225a7909c2851271327684585d7
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "1.0.0-incubating"
                },
                {
                    "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-2026-103501.json"