CVE-2024-23449: Elasticsearch Uncaught Exception

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-03-29 · updated 2026-06-17
Weakness: CWE-248

Description

An uncaught exception in Elasticsearch >= 8.4.0 and < 8.11.1 occurs when an encrypted PDF is passed to an attachment processor through the REST API. The Elasticsearch ingest node that attempts to parse the PDF file will crash. This does not happen with password-protected PDF files or with unencrypted PDF files.

Affected products

Elasticsearch: from 8.4.0 before 8.11.1 — fixed in 8.11.1

How to fix

Upgrade to a fixed version: Elasticsearch 8.11.1. Check the vendor advisory for mitigations.

References

https://discuss.elastic.co/t/elasticsearch-8-11-1-security-update-esa-2024-05/356458
https://discuss.elastic.co/t/elasticsearch-8-11-1-security-update-esa-2024-05/356458

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