# Apache DataSketches C++ vulnerabilities Source: https://junglewise.ai/threats/technologies/datasketches-c Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 12 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/datasketches-c.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 5 vulnerabilities in Apache DataSketches C++: 0 in the last 7 days and 5 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-103634, was published on 22 October 2026. 1 vulnerability in the last four weeks, down 75% on the four before (4). ## Counts - Last 7 days: 0 - Last 30 days: 1 - Last 90 days: 5 - All time: 5 (0 critical, 0 exploited in the wild) ## About Apache DataSketches C++ C++ library providing data structure algorithms for approximate statistical analysis. ## Latest Apache DataSketches C++ vulnerabilities - [CVE-2026-103634: Apache DataSketches C++ out-of-bounds read and write in Count-Min deserialization](https://junglewise.ai/threats/cve-2026-103634-out-of-bounds-read-and-write-in-the-count-min-sketch) (info, published 22 Oct 2026) - [CVE-2026-103636: Apache DataSketches C++ out-of-bounds read in VarOpt union deserialization](https://junglewise.ai/threats/cve-2026-103636-out-of-bounds-read-in-the-varopt-union-deserialization-of-apache) (info, published 10 Oct 2026) - [CVE-2026-103635: Apache DataSketches C++ out-of-bounds read in Theta sketch deserialization](https://junglewise.ai/threats/cve-2026-103635-out-of-bounds-read-in-the-compact-theta-sketch-deserialization) (info, published 10 Oct 2026) - [CVE-2026-103513: Apache DataSketches C++ out-of-bounds read/write in CPC deserialization](https://junglewise.ai/threats/cve-2026-103513-out-of-bounds-read-and-write-in-the-cpc-sketch-deserialization) (info, published 10 Oct 2026) - [CVE-2026-103501: Apache DataSketches C++ heap buffer overflow in HLL deserialization](https://junglewise.ai/threats/cve-2026-103501-heap-buffer-overflow-in-the-hll-sketch-deserialization-of-apache) (info, published 10 Oct 2026) ## Most severe Apache DataSketches C++ vulnerabilities - [CVE-2026-103636: Apache DataSketches C++ out-of-bounds read in VarOpt union deserialization](https://junglewise.ai/threats/cve-2026-103636-out-of-bounds-read-in-the-varopt-union-deserialization-of-apache) (info, published 10 Oct 2026) - [CVE-2026-103501: Apache DataSketches C++ heap buffer overflow in HLL deserialization](https://junglewise.ai/threats/cve-2026-103501-heap-buffer-overflow-in-the-hll-sketch-deserialization-of-apache) (info, published 10 Oct 2026) - [CVE-2026-103635: Apache DataSketches C++ out-of-bounds read in Theta sketch deserialization](https://junglewise.ai/threats/cve-2026-103635-out-of-bounds-read-in-the-compact-theta-sketch-deserialization) (info, published 10 Oct 2026) - [CVE-2026-103513: Apache DataSketches C++ out-of-bounds read/write in CPC deserialization](https://junglewise.ai/threats/cve-2026-103513-out-of-bounds-read-and-write-in-the-cpc-sketch-deserialization) (info, published 10 Oct 2026) - [CVE-2026-103634: Apache DataSketches C++ out-of-bounds read and write in Count-Min deserialization](https://junglewise.ai/threats/cve-2026-103634-out-of-bounds-read-and-write-in-the-count-min-sketch) (info, published 22 Oct 2026) ## Vulnerabilities per week 1 vulnerability in the last four weeks, down 75% on the four before (4). | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 4 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 1 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other Apache technologies - [Apache Airflow](https://junglewise.ai/threats/technologies/airflow): 95 vulnerabilities - [Apache Camel](https://junglewise.ai/threats/technologies/camel): 87 vulnerabilities - [Apache Tomcat](https://junglewise.ai/threats/technologies/tomcat): 87 vulnerabilities - [Apache Thrift](https://junglewise.ai/threats/technologies/thrift): 77 vulnerabilities - [Apache Ofbiz](https://junglewise.ai/threats/technologies/ofbiz): 67 vulnerabilities - [Apache HTTP Server](https://junglewise.ai/threats/technologies/http-server): 62 vulnerabilities - [Apache Traffic Server](https://junglewise.ai/threats/technologies/traffic-server): 55 vulnerabilities - [Apache Brpc](https://junglewise.ai/threats/technologies/brpc): 36 vulnerabilities - [Apache Roller](https://junglewise.ai/threats/technologies/roller): 30 vulnerabilities - [Apache CloudStack](https://junglewise.ai/threats/technologies/cloudstack): 28 vulnerabilities - [Apache ActiveMQ](https://junglewise.ai/threats/technologies/activemq): 27 vulnerabilities - [Apache Apisix](https://junglewise.ai/threats/technologies/apisix): 27 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Apache DataSketches C++ vulnerabilities", https://junglewise.ai/threats/technologies/datasketches-c, 12 November 2026.