Elastic Updates Elasticsearch for Seven Resource-Consumption Flaws
Tech GuruQuick Answer
The authority published ESA-2026-170 for Elasticsearch 8.x and 9.x branches enumerated in ESA-2026-170, 176, 179, 180, 182, 183, and 184. Elastic published seven advisories for uncontrolled resource consumption that can cause denial of service. Each advisory defines its own affected starting versions, configuration conditions, and first fixed releases; Elastic states that no workaround is available for the listed issues. Affected deployments should be matched to the authority's exact scope and moved to the supported fixed release.
Confirm Scope And Apply The Supported Fix
What to do now: Inventory Elasticsearch 8.x and 9.x branches enumerated in ESA-2026-170, 176, 179, 180, 182, 183, and 184, match the exact affected release or feature, apply the authority-supported fixed build or service remediation, validate the dependent workflow, and preserve evidence.
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
Elastic published seven advisories for uncontrolled resource consumption that can cause denial of service. Each advisory defines its own affected starting versions, configuration conditions, and first fixed releases; Elastic states that no workaround is available for the listed issues.
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. Confirm the resulting version or managed-service state, exercise representative functionality and recovery paths, monitor for regressions, and document exceptions.
- 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.
