CVE-2026-103005

mediumpriority · track · 0EPSS 0.003 · 24 %ileDEUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.31% (24th) EPSS

CVSS 6.5 · medium

Is it mine?

29 products

Check your exposure

Who says so?

2 sources

cert_bund · osv

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · security@elastic.coexploitability 2.8 · impact 3.6

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-789US

affected products (29)

Products and version ranges known to be affected.

Open Source Elasticsearch <8.19.19all versionscert_bundDE
Open Source Elasticsearch <8.19.21all versionscert_bundDE
Open Source Elasticsearch <8.19.22all versionscert_bundDE
Open Source Elasticsearch <9.3.8all versionscert_bundDE
Open Source Elasticsearch <9.4.4all versionscert_bundDE
Open Source Elasticsearch <9.4.6all versionscert_bundDE
Open Source Elasticsearch <9.4.7all versionscert_bundDE
Open Source Elasticsearch <9.4.8all versionscert_bundDE
Open Source Elasticsearch <9.5.2all versionscert_bundDE
Open Source Elasticsearch <9.5.4all versionscert_bundDE
Open Source Elasticsearch <9.5.5all versionscert_bundDE
Open Source Elasticsearch< 8.19.19cert_bundDE
Open Source Elasticsearch< 8.19.21cert_bundDE
Open Source Elasticsearch< 8.19.22cert_bundDE
Open Source Elasticsearch< 9.3.8cert_bundDE
Open Source Elasticsearch< 9.4.4cert_bundDE
Open Source Elasticsearch< 9.4.6cert_bundDE
Open Source Elasticsearch< 9.4.7cert_bundDE
Open Source Elasticsearch< 9.4.8cert_bundDE
Open Source Elasticsearch< 9.5.2cert_bundDE

showing 20 of 29

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3784Elasticsearch: Mehrere SchwachstellenDeutsch2026-10-06csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Elasticsearch ausnutzen, um Administratorrechte zu erlangen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren oder Denial-of-Service-Zustände auszulösen.
BIT-elasticsearch-2026-103005Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service2026-10-13vendor · osvUS
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.

sources

Which sources assert this record, and when.

cert_bund osv NVD CVE.org MITRE

published 2026-10-06modified 2026-10-09

references (1) nvd

External citations — patches, advisories, analysis.

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

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