CVE-2026-56149: Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of Service

mediumCVSS 4.9CVE-2026-56149

CSIRTS triage

vendor: Elastic product: Elasticsearch Denial of service

What: The vulnerability allows for denial of service due to resource allocation without limits.
Who is affected: Deployments of Elasticsearch are affected.
Urgency: Remediation is medium urgency due to the potential for service disruption.
Action: Implement resource limits or upgrade to a patched version when available.

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

⚡ Watch Elasticsearch

Get an email when a new Elasticsearch advisory drops — max one per day, one-click unsubscribe.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 4.9
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56149

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-2026-561490.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 30% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-56149	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-2026-56149: Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a …nvd

Recent advisories for Allocation of Resources

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.

unknownCVE-2026-68763: Uncontrolled Resource Consumption vulnerability in Apache Tomcat via an allocation leak in the…nvd · 2026-08-25
unknownCVE-2026-16756 - Allocation of resources without limits in the default aws-smithy-http-server serve() path all…aws · 2026-08-20
unknownCVE-2026-74836: Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows an…nvd · 2026-08-20
unknownCVE-2026-73541: Allocation of Resources Without Limits or Throttling in ZenHive mpp allows an unauthenticated …nvd · 2026-08-19
highCVE-2026-47628: NVIDIA Triton Inference Server for Linux contains a vulnerability where an attacker could caus…nvd · 2026-08-18
highCVE-2026-73635: Allocation of resources without limits or throttling vulnerability in Apache Struts. When no f…nvd · 2026-08-15