CVE-2026-63140 Affecting ruby3.3-elasticsearch package, versions <9.5.0-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-WOLFILATEST-RUBY33ELASTICSEARCH-18553576
- published6 Aug 2026
- disclosed21 Jul 2026
Introduced: 21 Jul 2026
NewCVE-2026-63140 (opens in a new tab)How to fix?
Upgrade Wolfi ruby3.3-elasticsearch to version 9.5.0-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ruby3.3-elasticsearch package and not the ruby3.3-elasticsearch package as distributed by Wolfi.
See How to fix? for Wolfi relevant fixed versions and status.
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.