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CVE-2026-56149

Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a denial of service via Excessive Allocation (CAPEC-130). A user with elevated privileges can submit a specially crafted machine learning request that causes excessive memory consumption, which may render the affected node unavailable.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ae131ecc176f0432207c92bc38c3ce115fb6e0696698ccbebb18dd9db67f2fc1
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"Elasticsearch","vendor":"Elastic","versions":[{"lessThanOrEqual":"9.4.2","status":"affected","version":"9.4.0","versionType":"semver"},{"lessThanOrEqual":"9.3.5","status":"affected","version":"9.0.0","versionType":"semver"},{"lessThanOrEqual":"8.19.16","status":"affected","version":"8.0.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:411e424749635a338cf9096eabfee99ee2e322fe180070b95f0aef5c5feabfa5 · sha256:67761e5d2e126eed… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":4.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:411e424749635a338cf9096eabfee99ee2e322fe180070b95f0aef5c5feabfa5 · sha256:67761e5d2e126eed… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-770","description":"CWE-770 Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:411e424749635a338cf9096eabfee99ee2e322fe180070b95f0aef5c5feabfa5 · sha256:67761e5d2e126eed… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"url":"https://discuss.elastic.co/t/elasticsearch-8-19-17-9-3-6-9-4-3-security-update-esa-2026-43"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:411e424749635a338cf9096eabfee99ee2e322fe180070b95f0aef5c5feabfa5 · sha256:67761e5d2e126eed… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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