CVE-2026-72686

Summary

A flaw in Elasticsearch allows a low-privileged authenticated user to submit a single request containing a crafted user-supplied input. A specific internal component validates the input using a recursive routine and applies no bound to the length of the value being validated, so the validation causes the thread to exhaust its stack. The resulting fatal error is not handled by the surrounding execution paths and terminates the affected node process, producing a denial of service.

Affected Software

VendorProductVersion RangeStatus
ElasticElasticsearch8.0.0 <= 8.19.19affected
ElasticElasticsearch9.0.0 <= 9.4.4affected
ElasticElasticsearch9.5.0affected

Weaknesses

  • CWE-674: CWE-674 Uncontrolled Recursion

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References