CVE-2026-72687

mediumpriority · track · 0EPSS 0.004 · 36 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.42% (36th) EPSS

CVSS 6.5 · medium

Is it mine?

15 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

A flaw in Elasticsearch allows a low-privileged authenticated user to submit a single small request containing a forged opaque identifier. Elasticsearch decodes and deserializes the identifier before confirming that it was legitimately issued by the cluster, and a size value carried inside the identifier drives an allocation that is neither capped nor accounted for by the available memory-usage controls. The resulting out-of-memory condition is fatal and terminates the affected node process, resulting in a denial of service.

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 · ENISA EU

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 (15)

Products and version ranges known to be affected.

Open Source Elasticsearch <8.19.20all versionscert_bundDE
Open Source Elasticsearch <9.4.5all versionscert_bundDE
Open Source Elasticsearch <9.5.1all versionscert_bundDE
Open Source Elasticsearch< 8.19.20cert_bundDE
Open Source Elasticsearch< 9.4.5cert_bundDE
Open Source Elasticsearch< 9.5.1cert_bundDE
Elastic Elasticsearch≤ 9.0.0 ≤9.4.4enisa_euvdEU
Elastic Elasticsearch≤ 9.5.0enisa_euvdEU
Elastic Elasticsearch≤ 8.0.0 ≤8.19.19enisa_euvdEU
elastic elasticsearch8.0.0 → 8.19.20nvdUScpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*
elastic elasticsearch9.0.0 → 9.4.5nvdUScpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*
elastic elasticsearch9.5.0 → 9.5.1nvdUScpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*
Bitnami elasticsearch8.0.0 → 8.19.20osvUSpkg:bitnami/elasticsearch
Bitnami elasticsearch9.0.0 → 9.4.5osvUSpkg:bitnami/elasticsearch
Bitnami elasticsearch9.5.0 → 9.5.1osvUSpkg:bitnami/elasticsearch

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2841Elasticsearch: Mehrere SchwachstellenDeutsch2026-08-13csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Elasticsearch ausnutzen, um beliebigen Programmcode auszuführen, und um einen Denial of Service Angriff durchzuführen.
BIT-elasticsearch-2026-72687Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service2026-08-19vendor · osvUS
A flaw in Elasticsearch allows a low-privileged authenticated user to submit a single small request containing a forged opaque identifier. Elasticsearch decodes and deserializes the identifier before confirming that it was legitimately issued by the cluster, and a size value carried inside the identifier drives an allocation that is neither capped nor accounted for by the available memory-usage controls. The resulting out-of-memory condition is fatal and terminates the affected node process, resulting in a denial of service.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd osv NVD CVE.org MITRE

published 2026-08-13modified 2026-09-01

references (4)

External citations — patches, advisories, analysis.

scry

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