CVE-2026-102407

mediumpriority · track · 0OT risk · elevatedEPSS 0.002 · 12 %ileDEUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.22% (12th) EPSS

CVSS 5.4 · medium

Is it mine?

29 products

Check your exposure

Who says so?

2 sources

cert_bund · osv

EPSS · scored 2026-10-24

Incorrect Authorization (CWE-863) in Elasticsearch can lead to unauthorized data stream modification via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). An authenticated user with sufficient privileges over a single resource could use the Modify Data Streams API to modify a data stream to which they were not otherwise authorized, potentially injecting data into it or affecting its ability to be searched normally. This issue does not allow an attacker to read the contents of a data stream they do not otherwise have access to.

cvss

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

5.4

010

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

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Lsecondary · security@elastic.coexploitability 2.8 · impact 2.5

v3.15mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/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-863US

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-2026-102407Incorrect Authorization in Elasticsearch Leading to Unauthorized Data Stream Modification2026-10-14vendor · osvUS
Incorrect Authorization (CWE-863) in Elasticsearch can lead to unauthorized data stream modification via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). An authenticated user with sufficient privileges over a single resource could use the Modify Data Streams API to modify a data stream to which they were not otherwise authorized, potentially injecting data into it or affecting its ability to be searched normally. This issue does not allow an attacker to read the contents of a data stream they do not otherwise have access to.

sources

Which sources assert this record, and when.

cert_bund osv NVD CVE.org MITRE

published 2026-10-06modified 2026-10-13

references (1) nvd

External citations — patches, advisories, analysis.

https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-188/390861Vendor Advisory

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