CVE-2026-106266: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-cw8p-7pg5-jcv5
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CVSS 6.5
CWE-441
Published
Advisory Summary

CVE-2026-106266 is a MODERATE (CVSS 6.5) security vulnerability vulnerability (CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product receives a request, message, or directive from an upstream component, but the product does not sufficiently preserve the original source of the request before forwarding the request to an external actor that is outside of the product's control sphere. this causes the product to appear to be the source of the request, leading it to act as a proxy or other intermediary between the upstream component and the external actor.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-106266 at a Glance

CVE Identifier CVE-2026-106266
GHSA Identifier GHSA-cw8p-7pg5-jcv5
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2026-106266

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-106266, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-441: Unintended Proxy or Intermediary ('Confused Deputy'), where the product receives a request, message, or directive from an upstream component, but the product does not sufficiently preserve the original source of the request before forwarding the request to an external actor that is outside of the product's control sphere. this causes the product to appear to be the source of the request, leading it to act as a proxy or other intermediary between the upstream component and the external actor. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Confused deputy in Contextual Tasks in Google Chrome prior to 155.0.8059.39 allowed a remote attacker who had compromised the renderer process to bypass web origin policy into a privileged page via a crafted HTML page. (Chromium security severity: Medium)

References

NVD — CVE-2026-106266 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-106266
chromereleases.googleblog.com/2026/10/stable-chan... WEB
https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_086471744.html
issues.chromium.org/issues/501914204 WEB
https://issues.chromium.org/issues/501914204

Frequently Asked Questions

What is CVE-2026-106266?
CVE-2026-106266 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-441: Unintended Proxy or Intermediary ('Confused Deputy').
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-106266?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-106266?
CVE-2026-106266 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
What CWE is associated with CVE-2026-106266?
CVE-2026-106266 is classified under CWE-441: Unintended Proxy or Intermediary ('Confused Deputy') (The product receives a request, message, or directive from an upstream component, but the product does not sufficiently preserve the original source of the request before forwarding the request to an external actor that is outside of the product's control sphere. This causes the product to appear to be the source of the request, leading it to act as a proxy or other intermediary between the upstream component and the external actor.).
How can I check Maven dependencies for CVE-2026-106266?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-cw8p-7pg5-jcv5",
  "modified" : "2026-10-10T00:30:25Z",
  "published" : "2026-10-06T21:31:45Z",
  "aliases" : [ "CVE-2026-106266" ],
  "details" : "Confused deputy in Contextual Tasks in Google Chrome prior to 155.0.8059.39 allowed a remote attacker who had compromised the renderer process to bypass web origin policy into a privileged page via a crafted HTML page. (Chromium security severity: Medium)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-106266"
  }, {
    "type" : "WEB",
    "url" : "https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_086471744.html"
  }, {
    "type" : "WEB",
    "url" : "https://issues.chromium.org/issues/501914204"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-441" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-06T19:17:54Z"
  }
}