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Fencer Vulns
medium 5.4

CVE-2026-102407 json

Incorrect Authorization in Elasticsearch Leading to Unauthorized Data Stream Modification

published 2026-10-06 33 d ago modified 2026-10-14 25 d ago also BIT-elasticsearch-2026-102407 , EUVD-2026-93928

cvss
5.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits
0
none known

Summary

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.

Patch / fix

  • bitnami elasticsearch 8.19.19, 9.3.8, 9.4.4
  • elasticsearch elasticsearch 8.19.19, 9.3.8, 9.4.4
  • elastic elasticsearch 8.19.19, 9.3.8, 9.4.4
  • org.elasticsearch elasticsearch 8.19.19, 9.3.8, 9.4.4

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-102407 updated cvss 5.4

elasticsearch: elasticsearch: unauthorized data modification via Modify Data Streams API

  • Red Hat OpenShift AI (RHOAI) rhoai/odh-feature-server-rhel9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Quay 3 quay/quay-rhel8, quay/quay-rhel9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
33 d ago

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
OSV 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Affected packages

ecosystem package affected fixed in
bitnami elasticsearch
>=7.17.5, <8.19.19
>=9.0.0, <9.3.8
>=9.4.0, <9.4.4
8.19.19
9.3.8
9.4.4

Affected products

  • Elastic Elasticsearch

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.