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TI-2026-84426 Aliases CVE-2026-115715GHSA-wj87-446p-485m

Unbounded allocation in Elasticsearch phonetic encoder exhausts heap

Priority LOW 29CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

Elasticsearch versions 8.0.0 through 8.19.23, 9.0.0 through 9.4.8, and 9.5.0 through 9.5.5 are affected. Unbounded resource allocation (CWE-770) lets a specially crafted input value processed by an affected phonetic encoder of the analysis-phonetic plugin exhaust node heap memory. An authenticated user with permission to write documents or run searches against an index that uses an affected encoder can make the node unresponsive or terminate.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to denial of service via a specially crafted input value that is processed by an affected phonetic encoder of the analysis-phonetic plugin. An authenticated user with permission to write documents to or run searches against an index that uses an affected encoder can cause an Elasticsearch node to exhaust its heap memory. The node can become unresponsive or terminate.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00321 25th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ElasticElasticsearch8.0.0 – 8.19.23; 9.0.0 – 9.4.8; 9.5.0 – 9.5.5—No fix listedCNA
  • Elasticsearch VendorElastic Affected 8.0.0 – 8.19.23; 9.0.0 – 9.4.8; 9.5.0 – 9.5.5 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*——Elastic
  • cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:* Versions — — ·Elastic

Remediation

The sources list no fixed version for Elasticsearch.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-11-03 Threatist record created from CVE-2026-115715
  2. 2026-11-03 CISA SSVC decision points changed
  3. 2026-11-03 Priority changed: MEDIUM → LOW
  4. 2026-11-03 Alias added: GHSA-wj87-446p-485m
  5. 2026-11-04 Affected versions changed · Red Hat
  6. 2026-11-04 CVSS score added · Red Hat

References

Other 1

  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2015-01295 The Groovy scripting engine in Elasticsearch before 1.3.8 and 1.4.x before 1.4.3 allows… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-02491 The default configuration in Elasticsearch before 1.2 enables dynamic scripting, which… KEVCVSS 3.1HIGH 8.1
  • TI-2018-12328 Kibana versions before 6.4.3 and 5.6.13 contain an arbitrary file inclusion flaw in the… CVSS 3.0CRITICAL 9.8
  • TI-2023-15037 Elasticsearch StackOverflow vulnerability CVSS 3.1HIGH 7.5
  • TI-2021-05135 Information disclosure in Elasticsearch CVSS 3.1MEDIUM 6.5
See all 414 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences