[NEW] [medium] Elasticsearch: Multiple vulnerabilities allow denial of service

A remote, authenticated attacker can exploit multiple vulnerabilities in Elasticsearch to conduct a denial of service attack.

CSIRTS triage

What: Multiple vulnerabilities allow for denial of service attacks.
Who is affected: Authenticated users of Elasticsearch are affected.
Urgency: Remediation is medium due to the potential for service disruption.
Action: Update Elasticsearch to the latest version to address these vulnerabilities.

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

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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 17% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-561480.35% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 28% of all EPSS-scored CVEs.
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.

CVE	CSIRTS overview	External
CVE-2026-49090	coverage & exploitation status	NVD · CVE.org
CVE-2026-56148	coverage & exploitation status	NVD · CVE.org
CVE-2026-56149	coverage & exploitation status	NVD · CVE.org

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