CVE-2026-122096
Published:November 11, 2026
Updated:November 13, 2026
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.
Affected Packages
https://github.com/apache/datasketches-java.git (GITHUB):
Affected version(s) >=1.0.0-incubating-RC1 <9.1.0 || >=2.0.0-RC1 <9.1.0 || >=3.0.0-RC1 <9.1.0 || >=4.0.0-RC1 <9.1.0 || >=5.0.0-RC1 <9.1.0 || >=6.0.0-RC1 <9.1.0 || >=7.0.0-RC1 <9.1.0 || >=8.0.0-RC1 <9.1.0 || >=9.0.0-RC1 <9.1.0Fix Suggestion:
Update to version 9.1.0org.apache.datasketches:datasketches-java (JAVA):
Affected version(s) >=1.0.0-incubating <9.1.0 || >=3.0.0 <9.1.0 || >=6.0.0 <9.1.0 || >=4.0.0 <9.1.0 || >=7.0.0 <9.1.0 || =8.0.0 <9.1.0 || =2.0.0 <9.1.0 || >=5.0.0 <9.1.0 || =9.0.0 <9.1.0Fix Suggestion:
Update to version 9.1.0Related Resources (8)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
EPSS
Base Score:
0.21