CVE-2026-63140 (GCVE-0-2026-63140)

Vulnerability from cvelistv5 – Published: 2026-07-21 21:04 – Updated: 2026-07-22 19:40
VLAI
Title
Reachable Assertion in Elasticsearch Leading to Denial of Service
Summary
Reachable Assertion (CWE-617) in Elasticsearch can lead to denial of service via Input Data Manipulation (CAPEC-153). A specially crafted search request containing a null value in a specific query clause causes an internal assertion to be raised during query parsing. Because Elasticsearch treats assertion failures as fatal errors, this terminates the affected node process. A low-privileged authenticated user with read access to at least one index can exploit this condition with a single request to cause a node to terminate, disrupting search availability. In a single-node deployment this fully stops Elasticsearch; in a multi-node cluster it reduces cluster capacity for each affected node.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 19:31 UTC
CWE
Assigner
elastic CNA under the mitre root
CNA scorecard C 69/100 over 161 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Elastic Elasticsearch Affected: 9.0.0 , ≤ 9.3.7 (semver)
Affected: 9.4.0 , ≤ 9.4.3 (semver)
Affected: 8.0.0 , ≤ 8.19.18 (semver)
guessed Create a notification for this product.
Show details on NVD website
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