Medium (6.5). EPSS 76% chance of exploitation in the next 30 days. Fixed in org.elasticsearch.client:elasticsearch-rest-client 7.13.4.
A memory disclosure vulnerability was identified in Elasticsearch 7.10.0 to 7.13.3 error reporting. A user with the ability to submit arbitrary queries to Elasticsearch could submit a malformed query that would result in an error message returned containing previously used portions of a data buffer. This buffer could contain sensitive information such as Elasticsearch documents or authentication details.
Severity
CVSS 3.1
6.5 medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS
76% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)