CVE-2026-103005: CWE-789 Memory Allocation with Excessive Size Value in Elastic Elasticsearch
Description
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.
CVSS v3.1
Score 6.5medium
Affected software
Elastic
Elasticsearch
pkg:maven/org.elasticsearch/elasticsearchRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-103005) in Elasticsearch is a CWE-789 issue where memory allocation with an excessive size value can be triggered by an authenticated user with connector management privileges. By creating and accessing connector resources with an excessively large 'description' field, the cluster allocates an uncontrolled amount of memory, leading to heap exhaustion and node crashes. This results in denial of service conditions. The CVSS 3.1 score is 6.5, reflecting a medium severity with network attack vector, low attack complexity, and requiring privileges but no user interaction.
Potential Impact
The impact is denial of service due to heap memory exhaustion and node crashes in the Elasticsearch cluster. There is no confidentiality or integrity impact reported. The attack requires authenticated privileges for connector management, limiting the attack surface to authorized users.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. In the meantime, restrict connector management privileges to trusted users only to reduce risk. Monitor for unusual memory usage patterns related to connector resource creation. No official fix or patch links are provided in the current data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- elastic
- Date Reserved
- 2026-09-29T20:57:38.467Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac550e22cdf04f656d8a147
Added to database: 10/06/2026, 19:49:54 UTC
Last enriched: 10/06/2026, 20:04:00 UTC
Last updated: 10/06/2026, 20:19:15 UTC
Views: 10
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.