Assessment
Why it matters
EPSS is 0.2%; technical severity is CVSS 6.5.
Incorrect Authorization (CWE-863) in Elasticsearch can allow an authenticated user with limited index privileges to exploit insufficient authorization controls in the ingest simulation feature. By targeting indices they are not authorized to access directly, the user can cause those indices' configured ingest pipelines to execute and return their output, potentially disclosing data processed or enriched by those pipelines. Additionally, the same feature can be used to retrieve index mapping metadata for indices the user are not authorized to access directly.
Who should care
- Teams operating Elasticsearch
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Elasticsearch is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Vendor advisory from discuss.elastic.co
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CWE
- CWE-863
- Affected versions
- Elastic Elasticsearch (Start Including 8.12.0, End Excluding 8.19.18 | Start Including 9.0.0, End Excluding 9.3.7 | Start Including 9.4.0, End Excluding 9.4.4)
- Fixed versions
- Elastic Elasticsearch (Fixed from 8.19.18, 9.3.7, 9.4.4)
- Published
- 21 July 2026
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
Signal timeline
- CVE published
- Latest EPSS score: 0.2%
- Signal calculated at 11