Elastic Updates Elasticsearch for Seven Resource-Consumption Flaws
Tech GuruQuick Answer
Seven Elasticsearch advisories describe resource-consumption flaws that can disrupt service. Their affected versions and first fixed releases differ. Check the complete set for your cluster and select a supported version that covers all applicable issues; a fix for one advisory is not necessarily a fix for the other six.
Confirm Scope And Apply The Supported Fix
Next step: Inventory cluster versions, plugins, features, and exposed request paths. Check all seven Elastic notices and the supported upgrade order before planning node maintenance.
Last verified: 2026-09-26 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | Elasticsearch 8.x and 9.x branches enumerated in ESA-2026-170, 176, 179, 180, 182, 183, and 184 |
|---|---|
| Advisory | ESA-2026-170 / ESA-2026-176 / ESA-2026-179 / ESA-2026-180 / ESA-2026-182 / ESA-2026-183 / ESA-2026-184 |
| CVEs | CVE-2026-82294, CVE-2026-82300, CVE-2026-94396, CVE-2026-94397, CVE-2026-94398, CVE-2026-94399, CVE-2026-94408 |
| Authoritative release date | 2026-09-25 08:33:09 UTC |
| Authority revision date | No separate revision date published |
| Affected versions | Advisory-specific Elasticsearch branches: 8.x beginning at 8.0.0 or 8.12.0 through 8.19.20 or 8.19.21, and 9.x beginning at 9.0.0 or 9.2.0 through the advisory-listed 9.4 and 9.5 releases. |
| Fixed version | the exact authority-listed branch release: 8.19.21 / 9.4.6 / 9.5.3 for ESA-2026-170; 8.19.22 / 9.4.7 / 9.5.3 for ESA-2026-184; and 8.19.22 / 9.4.7 / 9.5.4 where listed by the remaining advisories |
| CVSS base score | 4.9 / 6.5 (official CVSS v3.1) |
| CVSS severity | Medium |
| Exploitation status | Not stated by the authority; no exploitation claim is inferred. |
What Changed
These are availability risks, not a blanket claim of data theft or remote code execution. Elastic's listed issues have no general workaround. Access restrictions may reduce exposure, but should not be described as equivalent to a vendor fix.
What To Validate Now
- Inventory. Locate Elasticsearch 8.x and 9.x branches enumerated in ESA-2026-170, 176, 179, 180, 182, 183, and 184 deployments, versions, enabled features, exposure paths, owners, and dependent services.
- Establish applicability. Compare each deployment with the authority's affected-version statement: Advisory-specific Elasticsearch branches: 8.x beginning at 8.0.0 or 8.12.0 through 8.19.20 or 8.19.21, and 9.x beginning at 9.0.0 or 9.2.0 through the advisory-listed 9.4 and 9.5 releases. Do not infer applicability from product family or severity alone.
- Remediate. Apply the exact authority-listed branch release: 8.19.21 / 9.4.6 / 9.5.3 for ESA-2026-170; 8.19.22 / 9.4.7 / 9.5.3 for ESA-2026-184; and 8.19.22 / 9.4.7 / 9.5.4 where listed by the remaining advisories through the supported vendor or project channel, following the current advisory and change-control requirements.
- Validate. Record the version on every node, cluster and shard health, ingest behavior, representative searches and aggregations, and resource trends after the update. Verify snapshot and recovery readiness before rollout; do not test resource-exhaustion payloads on a production cluster.
- Retain evidence. Preserve asset and owner identifiers, the applicability decision, before-and-after versions, change approval, installation output, validation results, and any exception or rollback record.
Operational Cautions
Use the exact supported release stream and repository. Test dependencies, clusters, integrations, and rollback before broad deployment; a CVSS rating or reachable feature is not evidence of exploitation.
Evidence To Retain
- Exact product, release stream, package or application version, enabled feature, environment, and accountable owner.
- UTC timestamps, authority revision, approved change record, installer or package-manager output, and resulting version.
- Relevant logs and monitoring evidence, test results, exceptions, compensating controls, and rollback decisions.
Related TechGeeks Resources
Authoritative References
Correction policy: If the authority changes affected versions, fixed versions, severity, exploitation information, mitigations, or required action, TechGeeks will update this notice and its verification date.
