CVE-2026-8879: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-jg8r-xqh5-556r
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CVSS 7.5
CWE-829
Published
Advisory Summary

CVE-2026-8879 is a HIGH (CVSS 7.5) security vulnerability vulnerability (CWE-829: Inclusion of Functionality from Untrusted Control Sphere) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-8879 at a Glance

CVE Identifier CVE-2026-8879
GHSA Identifier GHSA-jg8r-xqh5-556r
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-829: Inclusion of Functionality from Untrusted Control Sphere
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:N/S:U/C:N/I:N/A:H).

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

How to Fix CVE-2026-8879

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-2026-8879, 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-829: Inclusion of Functionality from Untrusted Control Sphere, where the product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere. 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

Version 3.0.7 of the Securly Chrome Extension dynamically registers content13.min.js as a content script via chrome.scripting.registerContentScripts() at runtime. This script is NOT declared in manifest.json and bypasses Chrome Web Store static security review. It runs on all URLs and immediately hides all page content, creates a full-page overlay, pauses all videos, and only restores content when the service worker confirms the page passes filtering. If Securly's servers are unreachable, pages remain indefinitely hidden.

References

NVD — CVE-2026-8879 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-8879
kb.cert.org/vuls/id/595768 WEB
https://kb.cert.org/vuls/id/595768

Frequently Asked Questions

What is CVE-2026-8879?
CVE-2026-8879 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-829: Inclusion of Functionality from Untrusted Control Sphere.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-8879?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-8879?
CVE-2026-8879 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-8879?
CVE-2026-8879 is classified under CWE-829: Inclusion of Functionality from Untrusted Control Sphere (The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere.).
How can I check Maven dependencies for CVE-2026-8879?
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-jg8r-xqh5-556r",
  "modified" : "2026-06-04T15:30:33Z",
  "published" : "2026-06-03T21:30:31Z",
  "aliases" : [ "CVE-2026-8879" ],
  "details" : "Version 3.0.7 of the Securly Chrome Extension dynamically registers content13.min.js as a content script via chrome.scripting.registerContentScripts() at runtime. This script is NOT declared in manifest.json and bypasses Chrome Web Store static security review. It runs on all URLs and immediately hides all page content, creates a full-page overlay, pauses all videos, and only restores content when the service worker confirms the page passes filtering. If Securly's servers are unreachable, pages remain indefinitely hidden.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-8879"
  }, {
    "type" : "WEB",
    "url" : "https://kb.cert.org/vuls/id/595768"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-829" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-06-03T19:16:39Z"
  }
}