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

mediumCVE-2026-49090 CVE-2026-56148 CVE-2026-56149

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

CSIRTS triage

vendor: Elasticsearch product: Elasticsearch Denial of service

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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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-07-02
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2180

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.
Low exploitation riskCVE-2026-561480.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 23% of all scored CVEs.
Low exploitation riskCVE-2026-561490.32% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all scored CVEs.

Referenced 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

Same CVEs, other sources

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

Recent advisories for Elasticsearch

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.

mediumCVE-2026-46453: Improper Input Validation, Authorization Bypass Through User-Controlled Key vulnerability in A…nvd · 2026-07-06
mediumCVE-2026-49090: Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Servicemsrc · 2026-07-02
mediumCVE-2026-56149: Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of Ser…msrc · 2026-07-02
mediumCVE-2026-49090: Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to a denial of service v…nvd · 2026-07-01
mediumCVE-2026-56149: Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a …nvd · 2026-07-01
mediumCVE-2026-56148: Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to a denial of service via Excessiv…nvd · 2026-07-01