CVE-2026-78607

Missing Authorization in Elasticsearch Leading to Information Disclosure

State: Published
Severity: 5.4 Medium
Published: Sep 1, 2026
Updated: Sep 1, 2026
Reserved: Aug 24, 2026

Description

Missing Authorization (CWE-862) in the Elasticsearch custom inference service can lead to information disclosure via Privilege Abuse (CAPEC-122). A user holding only inference execution privileges could cause outbound inference traffic to be directed to a destination of their choosing and could cause administrator-provisioned credentials to be exposed.

Scores

CVSS	Score	Vector	Source
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N	elastic

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
ElasticsearchElastic	8.0.0 through 8.19.18Affected 9.0.0 through 9.3.7Affected 9.4.0 through 9.4.3Affected 9.5.0Affected

References

https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-9-5-1-security-update-esa-2026-143/390094

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