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Elastic Filebeat CVE-2026-78588

| EUVDEUVD-2026-70066 MEDIUM
Allocation of Resources Without Limits or Throttling (CWE-770)
2026-09-02 elastic GHSA-qr96-485q-v8j7
6.5
CVSS 3.1 · Vendor: elastic
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Severity by source

Vendor (elastic) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
6.5 MEDIUM

Network-reachable HTTP endpoint with low-privilege auth required; pure availability impact via memory exhaustion, no C/I consequence.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (elastic).

CVSS VectorVendor: elastic

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Analysis Generated
Sep 02, 2026 - 15:42 vuln.today
CVE Published
Sep 02, 2026 - 14:43 cve.org
MEDIUM 6.5

DescriptionCVE.org

Allocation of Resources Without Limits or Throttling (CWE-770) in Filebeat can lead to a denial of service via Excessive Allocation (CAPEC-130). An attacker able to reach the Filebeat HTTP ingestion endpoint could send specially crafted compressed requests that exhaust the memory resources of the Filebeat process.

AnalysisAI

Memory exhaustion denial of service in Filebeat's HTTP ingestion endpoint allows an authenticated low-privileged attacker to crash the Filebeat process by sending specially crafted compressed payloads that trigger unbounded decompression (a decompression-bomb / zip-bomb pattern). Affected versions span the 8.x and 9.x branches, with patched releases 8.19.18 and 9.3.1 published under Elastic Security Advisory ESA-2026-165. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the Filebeat HTTP ingestion endpoint (http_endpoint input plugin) is enabled in the Filebeat configuration - this is a non-default, operator-configured feature. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 score of 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) accurately reflects the threat profile: network-reachable, low complexity, but requiring low-level privileges (PR:L), with purely availability impact and no confidentiality or integrity consequence. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade Filebeat to version 8.19.18 (8.x branch) or 9.3.1 (9.x branch), as published in Elastic Security Advisory ESA-2026-165 at https://discuss.elastic.co/t/filebeat-8-19-18-9-3-1-security-update-esa-2026-165/390118. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-78588 vulnerability details – vuln.today

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