[NEW] [medium] Elasticsearch: Multiple vulnerabilities allow DoS and information disclosure
A remote, authenticated attacker can exploit multiple vulnerabilities in Elasticsearch to conduct a denial of service attack and disclose confidential information.
CSIRTS triage
- What
- A remote, authenticated attacker can exploit multiple vulnerabilities in Elasticsearch to conduct a denial of service attack and disclose confidential information.
- Who is affected
- Authenticated users of Elasticsearch are affected.
- Urgency
- Remediation is medium urgency as exploitation is possible but not currently being actively exploited.
- Action
- Apply the latest updates for Elasticsearch to mitigate the vulnerabilities.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2457
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-2026-561440.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all scored CVEs.
- Low exploitation riskCVE-2026-561450.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all scored CVEs.
- Low exploitation riskCVE-2026-631360.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all scored CVEs.
- Low exploitation riskCVE-2026-631400.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all scored CVEs.
- Low exploitation riskCVE-2026-631440.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all scored CVEs.
- Low exploitation riskCVE-2026-632630.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-56144 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-56145 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-63136 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-63140 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-63144 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-63263 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- mediumCVE-2026-63263: Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via…nvd
- unknownMultiple vulnerabilities in Elastic products (July 22, 2026)cert-fr-avis
- mediumCVE-2026-63144: Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via a speciall…nvd
- mediumCVE-2026-63140: Reachable Assertion (CWE-617) in Elasticsearch can lead to denial of service via Input Data Ma…nvd
- mediumCVE-2026-63136: Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via…nvd
- mediumCVE-2026-56145: Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via…nvd
- mediumCVE-2026-56144: Incorrect Authorization (CWE-863) in Elasticsearch can allow an authenticated user with limite…nvd
- mediumCVE-2026-63136: Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Servicemsrc
- mediumCVE-2026-63140: Reachable Assertion in Elasticsearch Leading to Denial of Servicemsrc
- mediumCVE-2026-56145: Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Servicemsrc
- mediumCVE-2026-63263: Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Servicemsrc
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-2026-63263: Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via…nvd · 2026-07-22
- mediumCVE-2026-63144: Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via a speciall…nvd · 2026-07-21
- mediumCVE-2026-63140: Reachable Assertion (CWE-617) in Elasticsearch can lead to denial of service via Input Data Ma…nvd · 2026-07-21
- mediumCVE-2026-63136: Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via…nvd · 2026-07-21
- mediumCVE-2026-56145: Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via…nvd · 2026-07-21
- mediumCVE-2026-56144: Incorrect Authorization (CWE-863) in Elasticsearch can allow an authenticated user with limite…nvd · 2026-07-21
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