CVE-2026-49090: Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service

mediumCVSS 6.5CVE-2026-49090

CSIRTS triage

vendor: null product: Elasticsearch Denial of service

What: Uncontrolled resource consumption can lead to denial of service.
Who is affected: Deployments of Elasticsearch.
Urgency: Remediation is medium urgency as it can cause service disruption.
Action: Monitor resource usage and apply any available patches.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 6.5
Published: 2026-07-02
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49090

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-490900.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 16% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-49090	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

medium[NEW] [medium] Elasticsearch: Multiple vulnerabilities allow denial of servicecert-bund
unknownMultiple vulnerabilities in Elastic products (July 2, 2026)cert-fr-avis
mediumCVE-2026-49090: Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to a denial of service v…nvd

Recent advisories for Uncontrolled Resource Consumption

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-40007: Uncontrolled Recursion, Uncontrolled Resource Consumption vulnerability in Apache IoTDB. When …nvd · 2026-07-10
highCVE-2026-24012: Uncontrolled Resource Consumption vulnerability in Apache IoTDB. Some interface fails to impos…nvd · 2026-07-06
mediumCVE-2026-49090: Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to a denial of service v…nvd · 2026-07-01
highCVE-2026-54399: Uncontrolled Resource Consumption vulnerability in the HTTP/1.1 message parser in Apache HttpC…nvd · 2026-07-01
criticalexploitedCVE-2026-28318: SolarWinds Serv-U Uncontrolled Resource Consumption Vulnerabilitycisa-kev · 2026-06-05
lowGHSA-647r-72hf-4vmh: Code Index MCP is vulnerable to Uncontrolled Resource Consumptionghsa · 2026-06-03