---
id: "CVE-2026-115710"
kind: "vulnerability"
aliases: ["CVE-2026-115710"]
title: "Elasticsearch: shared query cache leaks hidden field matches between users"
severity: "medium"
cvss: 4.2
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["elasticsearch", "field-level-security", "package", "self-hosted"]
not_affected_if: ["no-field-level-security", "single-user-cluster"]
published_at: "2026-11-03T17:17:55+00:00"
first_seen_at: "2026-11-03T17:21:55+00:00"
updated_at: "2026-11-03T17:24:43+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-115710", "first_seen_at": "2026-11-03T17:21:55+00:00"}]
---

# Elasticsearch: shared query cache leaks hidden field matches between users

Elasticsearch can share cached query results between users with field-level security and users without it, for some query types. A restricted user can learn which documents match a value in a field they cannot read, and can cause full-access users to receive incomplete search results.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-11-03T17:21:55+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-115710

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_