# CVE-2026-115710: Use of Cache Containing Sensitive Information in Elasticsearch Leading to Information Disclosure

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Elastic / Elasticsearch: ≥ 8.9.0; ≤ 8.19.23 (affected, semver); ≥ 9.0.0; ≤ 9.4.8 (affected, semver); ≥ 9.5.0; ≤ 9.5.5 (affected, semver). Source: CNA: elastic

## Severity and prioritization

- CVSS 3.1: 4.2 (medium); CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N; source: CNA: elastic

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-524

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://discuss.elastic.co/t/elasticsearch-8-19-24-9-4-9-9-5-6-security-update-esa-2026-210/391363 (CNA: elastic)

## Provenance

- CNA: elastic: https://www.cve.org/CVERecord?id=CVE-2026-115710; retrieved 2026-11-03; source updated 2026-11-03

Revision: ef4a268fd292ebcfdea312b03496aedbdd851fd69e7f707baafe157f7d2f7e9b

Canonical: https://y2.dev/cve/CVE-2026-115710

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