---
id: CVE-2026-115710
title: >-
  Use of Cache Containing Sensitive Information in Elasticsearch Leading to
  Information Disclosure
summary: >-
  Use of Cache Containing Sensitive Information (CWE-524) in Elasticsearch can
  lead to information disclosure and incorrect search results via specially
  crafted search requests. For some query types, Elasticsearch can share cached
  query re…
severity: medium
cvss: 4.2
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-524
vendor: Elastic
product: Elasticsearch
affected:
  - Elasticsearch >= 8.9.0 <= 8.19.23
  - Elasticsearch >= 9.0.0 <= 9.4.8
  - Elasticsearch >= 9.5.0 <= 9.5.5
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-03T17:30:03.351642Z'
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T17:30:13.952Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-115710'
references:
  - url: >-
      https://discuss.elastic.co/t/elasticsearch-8-19-24-9-4-9-9-5-6-security-update-esa-2026-210/391363
tags:
  - cve.org
epss: 0.00169
epssPercentile: 0.06357
ingestedAt: '2026-11-05T20:33:06.326Z'
---

## Overview

Use of Cache Containing Sensitive Information (CWE-524) in Elasticsearch can lead to information disclosure and incorrect search results via specially crafted search requests. For some query types, Elasticsearch can share cached query results between users who have field-level security restrictions and users who do not. A user restricted by field-level security can learn which documents match a value in a field that they cannot read. A restricted user can also cause users with full access to receive incomplete search results. Disclosure is only possible when a user with full access ran the same query on the same shard recently.

## Affected

- `Elasticsearch >= 8.9.0 <= 8.19.23`
- `Elasticsearch >= 9.0.0 <= 9.4.8`
- `Elasticsearch >= 9.5.0 <= 9.5.5`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.