Bug 2571678 (CVE-2026-122096)

Summary:	CVE-2026-122096 org.apache.datasketches/datasketches-java: datasketches-java: Denial of Service via untrusted input deserialization
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in Apache DataSketches Java. When processing serialized sketch data from untrusted sources, the library improperly trusts size and count values declared within the input. A remote attacker can exploit this flaw by supplying crafted data to induce excessive memory allocation or an infinite loop, resulting in a Denial of Service (DoS).	Story Points:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Description OSIDB Bzimport 2026-11-11 12:31:26 UTC

Uncontrolled Resource Consumption vulnerability in the sketch deserialization of Apache DataSketches Java.



Several deserializers trusted sizes and counts declared in the serialized input. A small crafted input could make an application allocate an excessive amount of memory, leading to an OutOfMemoryError. A crafted string passed to FrequentLongsSketch.getInstance(String) could also make deserialization, or a later update, loop indefinitely. Only applications that deserialize sketches from untrusted sources are affected.



This issue affects Apache DataSketches Java: through 9.0.0.



Users are recommended to upgrade to version 9.1.0, which fixes the issue.