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    CVE-2026-102407

    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.

    Published:Oct 6, 2026
    Last Modified:Oct 13, 2026
    EPS:Oct 6, 2026
    EPSS Score:0.00218
    CVSS Score:5.4

    Affected Products

    Vendor
    Elastic
    Product
    Elasticsearch

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-103009 (CVSS 7.1) — Authorization Bypass Through User-Controlled Key (CWE-639) in Elasticsearch can lead to Information Disclosure…
    CVE-2026-103008 (CVSS 6.5) — Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to Denial of Service via a specially crafted reques…
    CVE-2026-103007 (CVSS 7.2) — Incorrect Authorization (CWE-863) in Elasticsearch can lead to Privilege Escalation via a delegated administra…
    CVE-2026-103006 (CVSS 6.5) — Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to Denial of Service via a specially crafted, deepl…
    CVE-2026-103005 (CVSS 6.5) — Memory Allocation with Excessive Size Value (CWE-789) in Elasticsearch can lead to denial of service via Exces…
    CVE-2026-102411 (CVSS 6.5) — Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to Denial of Service …
    CVE-2026-102409 (CVSS 6.5) — Uncontrolled Recursion (CWE-674) in Elasticsearch can allow an authenticated user with low privileges to termi…
    CVE-2026-102408 (CVSS 4.3) — Inefficient Regular Expression Complexity (CWE-1333) in Elasticsearch can lead to denial of service via Regula…
    CVE-2026-102404 (CVSS 6.5) — Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Excessive Alloc…
    CVE-2026-94408 (CVSS 4.9) — Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead denial of service via Excessive Allocati…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-102407 — Elastic (Medium 5.4) | CVE-DB