CVE-2023-46674: Elasticsearch-hadoop Unsafe Deserialization

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-12-05 · updated 2026-06-17
Weakness: CWE-502

Description

An issue was identified that allowed the unsafe deserialization of java objects from hadoop or spark configuration properties that could have been modified by authenticated users. Elastic would like to thank Yakov Shafranovich, with Amazon Web Services for reporting this issue.

Affected products

Elasticsearch: before 7.17.11; from 8.0.0 before 8.9.0 — fixed in 7.17.11, 8.9.0

How to fix

Upgrade to a fixed version: Elasticsearch 7.17.11, 8.9.0. Check the vendor advisory for mitigations.

References

https://discuss.elastic.co/t/elasticsearch-hadoop-7-17-11-8-9-0-security-update-esa-2023-28/348663
https://discuss.elastic.co/t/elasticsearch-hadoop-7-17-11-8-9-0-security-update-esa-2023-28/348663

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