CVE-2026-42397: Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana can lead to a denial of service via Excessive Allocation (CAPEC-130). An authenticated user can submit a sp

mediumCVSS 6.5CVE-2026-42397

Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana can lead to a denial of service via Excessive Allocation (CAPEC-130). An authenticated user can submit a specially crafted request to affected Entity Analytics endpoints containing an oversized input value that causes excessive resource consumption, which may render Kibana unavailable.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 6.5
Published: 2026-07-21
Last updated: 2026-07-22
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-42397

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-2026-423970.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-42397	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] Kibana: Multiple vulnerabilitiescert-bund
unknownMultiple vulnerabilities in Elastic products (July 22, 2026)cert-fr-avis

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-2026-14539: An allocation of resources without limits vulnerability in the HTTP handler component of Googl…nvd · 2026-07-31
unknownCVE-2026-65624: Allocation of Resources Without Limits or Throttling vulnerability in ninenines cowboy allows …nvd · 2026-07-28
unknownCVE-2026-59248: Allocation of resources without limits vulnerability in ninenines cowlib allows an unauthentic…nvd · 2026-07-28
unknownCVE-2026-59251: Allocation of resources without limits in Erlang/OTP public_key certificate path validation al…nvd · 2026-07-27
highCVE-2026-58389: Allocation of Resources Without Limits or Throttling vulnerability in Apache Thrift Rust bindi…nvd · 2026-07-27
highCVE-2026-55968: Inefficient Algorithmic Complexity, Allocation of Resources Without Limits or Throttling vulne…nvd · 2026-07-27