Elk: Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Service (CVE-2026-49089)
A vulnerability in Kibana allows an authenticated user with read-only privileges to cause a denial of service by sending a query expression without limits on its size. This oversized expression causes the Kibana process to spend an unbounded amount of time evaluating it, rendering the service unavailable until restarted. The issue affects Kibana versions from 8.0.0 up to but not including 8.19.20, and from 9.0.0 up to but not including 9.4.5. A patch is available to address this resource allocation flaw.
AI Analysis
Technical Summary
CVE-2026-49089 describes a resource allocation vulnerability in Kibana where a connector reporting operation processes query expressions without size limits or throttling. An authenticated user with read-only access can submit an excessively large query expression that causes the Kibana process to consume unbounded CPU time evaluating it, resulting in denial of service. This flaw is categorized under CWE-770 (Allocation of Resources Without Limits or Throttling) and CAPEC-130 (Excessive Allocation). The vulnerability affects Kibana versions >=8.0.0 <8.19.20 and >=9.0.0 <9.4.5. No known exploits are reported in the wild. A patch is available to mitigate this issue.
Potential Impact
An authenticated user with read-only privileges can cause Kibana to become unresponsive by submitting a single oversized query expression. This leads to denial of service, requiring a process restart to restore functionality. The impact is limited to service availability and does not indicate privilege escalation or data compromise.
Mitigation Recommendations
A patch is available for this vulnerability. Users should upgrade Kibana to versions 8.19.20 or later, or 9.4.5 or later, where this issue is fixed. Applying the official update will prevent denial of service caused by excessive resource allocation in query processing.
Elk: Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Service (CVE-2026-49089)
Description
A vulnerability in Kibana allows an authenticated user with read-only privileges to cause a denial of service by sending a query expression without limits on its size. This oversized expression causes the Kibana process to spend an unbounded amount of time evaluating it, rendering the service unavailable until restarted. The issue affects Kibana versions from 8.0.0 up to but not including 8.19.20, and from 9.0.0 up to but not including 9.4.5. A patch is available to address this resource allocation flaw.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-49089 describes a resource allocation vulnerability in Kibana where a connector reporting operation processes query expressions without size limits or throttling. An authenticated user with read-only access can submit an excessively large query expression that causes the Kibana process to consume unbounded CPU time evaluating it, resulting in denial of service. This flaw is categorized under CWE-770 (Allocation of Resources Without Limits or Throttling) and CAPEC-130 (Excessive Allocation). The vulnerability affects Kibana versions >=8.0.0 <8.19.20 and >=9.0.0 <9.4.5. No known exploits are reported in the wild. A patch is available to mitigate this issue.
Potential Impact
An authenticated user with read-only privileges can cause Kibana to become unresponsive by submitting a single oversized query expression. This leads to denial of service, requiring a process restart to restore functionality. The impact is limited to service availability and does not indicate privilege escalation or data compromise.
Mitigation Recommendations
A patch is available for this vulnerability. Users should upgrade Kibana to versions 8.19.20 or later, or 9.4.5 or later, where this issue is fixed. Applying the official update will prevent denial of service caused by excessive resource allocation in query processing.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BIT-kibana-2026-49089
- Osv Schema Version
- 1.6.2
- Aliases
- ["CVE-2026-49089"]
- Ecosystems
- ["Bitnami"]
- Database Specific Severity
- Medium
- Cvss Version
- null
Threat ID: 6a85b4abacd9273b49250f36
Added to database: 08/19/2026, 13:50:35 UTC
Last enriched: 08/19/2026, 14:07:31 UTC
Last updated: 08/19/2026, 22:52:13 UTC
Views: 4
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