{ "canonical_id": "kibana--844efe5dac", "system_id": "kibana", "display_name": "Kibana", "category": "platforms", "advisory_mode": "core", "title": "Kibana 8.19.13, 9.2.7, 9.3.2 Security Update (ESA-2026-20)", "summary": "

Improper Validation of Specified Quantity in Input in Kibana Leading to Denial of Service

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Improper Validation of Specified Quantity in Input (CWE-1284) in the Timelion visualization plugin in Kibana can lead Denial of Service via Excessive Allocation (CAPEC-130). The vulnerability allows an authenticated user to send a specially crafted Timelion expression that overwrites internal series data properties with an excessively large quantity value.

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Affected Versions:

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Affected Configurations:

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The Timelion visualization plugin (visTypeTimelion) is enabled by default in Kibana and is listed under \"Legacy editors\" in the documentation.

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Solutions and Mitigations:

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The issue is resolved in version 8.19.13, 9.2.7, 9.3.2.

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For Users that Cannot Upgrade:

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Self-hosted
\nUsers can set this property in the Kibana config YAML file vis_type_timelion.enabled: false

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Cloud
\nThere are no workaround

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Indicators of Compromise (IOC)

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Look for JavaScript heap out of memory or FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed errors in Kibana server logs, which indicate the Node.js process crashed due to memory exhaustion.

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Elastic Cloud Serverless

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Due to our continuous deployment and patching model, the vulnerability described in this security advisory was remediated in our Elastic Cloud Serverless offering before the public disclosure.

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Severity: CVSSv3.1: Medium ( 6.5 ) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
\nCVE ID: CVE-2026-26940
\nProblem Type: CWE-1284 - Improper Validation of Specified Quantity in Input
\nImpact: CAPEC-130 - Excessive Allocation

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1 post - 1 participant

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Read full topic

", "published_at": "Thu, 19 Mar 2026 16:59:58 +0000", "updated_at": "Thu, 19 Mar 2026 16:59:58 +0000", "severity": "unknown", "cvss_score": null, "exploit_status": "unknown", "source_confidence": "official", "official_source_url": "https://discuss.elastic.co/t/kibana-8-19-13-9-2-7-9-3-2-security-update-esa-2026-20/385535", "secondary_source_urls": [], "aliases": [], "cve_ids": [], "ghsa_ids": [], "osv_ids": [], "affected_versions": [], "fixed_versions": [], "package_name": null, "render_markdown": false, "case_path": null, "secure_code_topics": [ "authz-server-side-recheck", "xss-output-encoding", "proxy-trust-boundary", "plugin-extension-trust-policy", "dependency-upgrade-policy" ], "status": "triage", "triage_reasons": [ "missing affected/fixed version details" ], "entity_refs": [ { "entity_id": "kibana", "entity_type": "system", "relation": "root-system", "root_system_id": "kibana", "official": true } ], "affected_components": [ { "name": "Kibana", "entity_id": "kibana", "scope": 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