CVE-2026-8933: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-fxqr-j4gx-622c
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CVSS 7.8
CWE-250
Published
Advisory Summary

CVE-2026-8933 is a HIGH (CVSS 7.8) security vulnerability vulnerability (CWE-250: Execution with Unnecessary Privileges) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product performs an operation at a privilege level that is higher than the minimum level required, which creates new weaknesses or amplifies the consequences of other weaknesses.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-8933 at a Glance

CVE Identifier CVE-2026-8933
GHSA Identifier GHSA-fxqr-j4gx-622c
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification CWE-250: Execution with Unnecessary Privileges
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.8

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

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

How to Fix CVE-2026-8933

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-2026-8933, 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-250: Execution with Unnecessary Privileges, where the product performs an operation at a privilege level that is higher than the minimum level required, which creates new weaknesses or amplifies the consequences of other weaknesses. 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

A local privilege escalation vulnerability exists in snap-confine, a set-capabilities core component used internally by Canonical snapd to construct the secure execution environment for snap applications. This vulnerability uniquely affects versions of snap-confine configured with set-capabilities (rather than standard set-uid-root installations). Due to a flaw in how privilege boundaries or security sandboxes are initialized when the binary runs under limited ambient capabilities, a local, unprivileged attacker can exploit this behavior to bypass intended restrictions and execute arbitrary code. Successful exploitation allows the local user to elevate their privileges to full root authority.

References

NVD — CVE-2026-8933 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-8933
Software Security Information SECURITY
https://ubuntu.com/security/CVE-2026-8933

Frequently Asked Questions

What is CVE-2026-8933?
CVE-2026-8933 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-250: Execution with Unnecessary Privileges.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-8933?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-8933?
CVE-2026-8933 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-8933?
CVE-2026-8933 is classified under CWE-250: Execution with Unnecessary Privileges (The product performs an operation at a privilege level that is higher than the minimum level required, which creates new weaknesses or amplifies the consequences of other weaknesses.).
How can I check Maven dependencies for CVE-2026-8933?
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-fxqr-j4gx-622c",
  "modified" : "2026-07-21T15:30:45Z",
  "published" : "2026-07-21T15:30:45Z",
  "aliases" : [ "CVE-2026-8933" ],
  "details" : "A local privilege escalation vulnerability exists in snap-confine, a set-capabilities core component used internally by Canonical snapd to construct the secure execution environment for snap applications. This vulnerability uniquely affects versions of snap-confine configured with set-capabilities (rather than standard set-uid-root installations).\nDue to a flaw in how privilege boundaries or security sandboxes are initialized when the binary runs under limited ambient capabilities, a local, unprivileged attacker can exploit this behavior to bypass intended restrictions and execute arbitrary code. Successful exploitation allows the local user to elevate their privileges to full root authority.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-8933"
  }, {
    "type" : "WEB",
    "url" : "https://ubuntu.com/security/CVE-2026-8933"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-250" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-21T15:16:39Z"
  }
}