CVE-2026-123274
Received
Received - Intake
Out-of-Bounds Write in Apache DataSketches C++
Vulnerability report for CVE-2026-123274, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-11-13
Last updated on: 2026-11-13
Assigner: Apache Software Foundation
Description
Description
Out-of-bounds Write vulnerability in Apache DataSketches C++. An
application that deserializes a KLL sketch from an untrusted source
can have heap memory corrupted by a crafted sketch, because the
serialized level boundaries were not validated.
This issue affects Apache DataSketches C++: 2.0.0 through 5.3.0.
Users are recommended to upgrade to version 5.3.1, which fixes the
issue.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| apache | datasketches_cpp | From 2.0.0 (inc) to 5.3.0 (inc) |
| apache | datasketches_cpp | 5.3.1 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-787 | The product writes data past the end, or before the beginning, of the intended buffer. |
