TI-2026-68582 Aliases CVE-2026-103005 GHSA-6w6g-ww2r-qrcm

Memory over-allocation in Elasticsearch enables denial of service

LOW 29CWE-789Published 2026-10-06 · Updated 2026-10-06

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: Deferred Red Hat: fix deferred

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-789.

Summary

Elastic Elasticsearch from 8.12.0 before 8.19.22, from 9.0.0 before 9.3.8, from 9.4.0 before 9.4.7 and from 9.5.0 before 9.5.4 is affected. A missing limit on memory allocation size (CWE-789) lets the cluster allocate uncontrolled memory when connector resources with an excessively large description field are created and then accessed. An authenticated user with connector management privileges can exhaust heap memory and crash the affected node.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

Memory Allocation with Excessive Size Value (CWE-789) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user with connector management privileges could cause the cluster to allocate an uncontrolled amount of memory when connector resources with an excessively large `description` field are created and subsequently accessed, exhausting available heap memory and crashing the affected node.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00309 23rd percentileScored 2026-11-07

Fix Deferred Red Hat: fix deferred

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

Vendor	Product	Affected versions	Fixed in	Status	Source
Elastic	Elasticsearch	8.12.0 – 8.19.22; 9.0.0 – 9.3.8; 9.4.0 – 9.4.7; 9.5.0 – 9.5.4	—	No fix listed	CNA

Elasticsearch VendorElastic Affected 8.12.0 – 8.19.22; 9.0.0 – 9.3.8; 9.4.0 – 9.4.7; 9.5.0 – 9.5.4 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:elastic:elasticsearch::::::::	8.12.0 to before 8.19.23; 9.0.0 – 9.3.8; 9.4.0 to before 9.4.8; 9.5.0 to before 9.5.5	Vulnerable	Elastic

cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:* Versions 8.12.0 to before 8.19.23; 9.0.0 – 9.3.8; 9.4.0 to before 9.4.8; 9.5.0 to before 9.5.5 Vulnerable ·Elastic

Remediation

The sources list no fixed version for Elasticsearch. Red Hat OpenShift AI (RHOAI) is affected, with Red Hat's plan listed as none available.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat OpenShift AI (RHOAI)	Affected	No fix yet: Fix deferred

Not affected: 1 product

Red Hat Quay 3

Timeline

2026-10-06 Threatist record created from CVE-2026-103005
2026-10-07 CISA SSVC decision points changed
2026-10-07 Priority changed: MEDIUM → LOW
2026-10-07 Alias added: GHSA-6w6g-ww2r-qrcm
2026-10-07 Affected versions changed · Red Hat
2026-10-07 CVSS score added · Red Hat
2026-10-08 Affected versions changed · Red Hat

References

Advisory 1

https://discuss.elastic.co/t/elasticsearch-8-19-23-9-4-8-9-5-5-security-update-esa-2026-195/390869

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-2023-15037 Elasticsearch StackOverflow vulnerability CVSS 3.1HIGH 7.5
TI-2021-05135 Information disclosure in Elasticsearch CVSS 3.1MEDIUM 6.5
TI-2021-05136 All versions of Elastic Cloud Enterprise has the Elasticsearch “anonymous” user enabled… CVSS 3.1HIGH 7.5
TI-2015-04530 Elasticsearch before 1.6.1 allows remote attackers to execute arbitrary code via… CVSS 3.0CRITICAL 9.8

See all 90 →

Sources

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