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6.5 Medium

CVE-2026-102411 Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to Denial of Service via…

Description

Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to Denial of Service via Excessive Allocation (CAPEC-130). Elasticsearch enforces a size limit on the user-supplied metadata field for each individual template resource, but does not limit the total memory used when multiple such resources are retrieved together. A user holding the *manage_index_templates* cluster privilege can register multiple resources each within the individual limit. Retrieving them together materializes all of their metadata values in memory at once, exhausting available heap and causing the affected node to fail with an out-of-memory error, resulting in a denial of service.

Affected products and versions

Product Affected versions Fixed in
Elasticsearch 9.5 9.5.0 → 9.5.2 No fix stated
Elasticsearch 9.0 9.0.0 → 9.4.6 No fix stated
Elasticsearch 8.0 8.0.0 → 8.19.22 No fix stated

References

Timeline

  1. Published
  2. Last modified

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