# Elasticsearch 8.11.1 Security Update (ESA-2024-05)

**URL:** <https://discuss.elastic.co/t/elasticsearch-8-11-1-security-update-esa-2024-05/356458>\
**Category:** Security Announcements\
**Created:** [March 29, 2024, 11:12am UTC](https://discuss.elastic.co/t/elasticsearch-8-11-1-security-update-esa-2024-05/356458 "2024-03-29T11:12:33Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ismisepaul](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ismisepaul/32/102235_2.png) [@ismisepaul](https://discuss.elastic.co/u/ismisepaul)\
**Post date:** [March 29, 2024, 11:12am UTC](https://discuss.elastic.co/t/elasticsearch-8-11-1-security-update-esa-2024-05/356458/1 "2024-03-29T11:12:33Z")

</div>

**Elasticsearch Uncaught Exception (ESA-2024-05)**

An uncaught exception in Elasticsearch \>= 8.4.0 and \< 8.11.1 occurs when an encrypted PDF is passed to an [attachment processor](https://www.elastic.co/guide/en/elasticsearch/reference/current/attachment.html) 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 Versions:**  
Affects versions \>= 8.4.0 and \< 8.11.1

**Solutions and Mitigations:**  
The issue is resolved in version 8.11.1.

This requires the attachment processor to be enabled. Users unable to upgrade can ensure that the [attachment processor](https://www.elastic.co/guide/en/elasticsearch/reference/current/attachment.html) is disabled.

**Severity:** CVSSv3: 4.3(Medium) - [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L](https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L)

**CVE ID:** CVE-2024-23449