CVE-2026-16730: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-77qf-9j4m-ph58
Share
CVSS 5.5
CWE-755
Published
Advisory Summary

CVE-2026-16730 is a MODERATE (CVSS 5.5) security vulnerability vulnerability (CWE-755: Improper Handling of Exceptional Conditions) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not handle or incorrectly handles an exceptional condition.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-16730 at a Glance

CVE Identifier CVE-2026-16730
GHSA Identifier GHSA-77qf-9j4m-ph58
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-755: Improper Handling of Exceptional Conditions
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.5

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:N/I:N/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 None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-16730

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-2026-16730, 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-755: Improper Handling of Exceptional Conditions, where the product does not handle or incorrectly handles an exceptional condition. 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 flaw was found in dbus-broker. When the process file-descriptor limit is reached, EMFILE/ENFILE errors during peer setup (notably SO_PEERPIDFD) are handled as fatal failures, causing the broker to exit. A local attacker who can open many connections to the user session bus can trigger this and deny service to the desktop session. Flatpak applications can reach the host session bus through the dbus proxy.

References

NVD — CVE-2026-16730 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-16730
Software Source Repository REPOSITORY
https://github.com/bus1/dbus-broker/issues/435
access.redhat.com/errata/rhsa-2026:61... WEB
https://access.redhat.com/errata/RHSA-2026:61340
access.redhat.com/errata/rhsa-2026:61... WEB
https://access.redhat.com/errata/RHSA-2026:61355
access.redhat.com/errata/rhsa-2026:66... WEB
https://access.redhat.com/errata/RHSA-2026:66018
Software Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-16730
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2506348

Frequently Asked Questions

What is CVE-2026-16730?
CVE-2026-16730 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-755: Improper Handling of Exceptional Conditions.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-16730?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-16730?
CVE-2026-16730 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-16730?
CVE-2026-16730 is classified under CWE-755: Improper Handling of Exceptional Conditions (The product does not handle or incorrectly handles an exceptional condition.).
How can I check Maven dependencies for CVE-2026-16730?
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-77qf-9j4m-ph58",
  "modified" : "2026-09-10T18:31:20Z",
  "published" : "2026-07-24T12:30:53Z",
  "aliases" : [ "CVE-2026-16730" ],
  "details" : "A flaw was found in dbus-broker. When the process file-descriptor limit is reached, EMFILE/ENFILE errors during peer setup (notably SO_PEERPIDFD) are handled as fatal failures, causing the broker to exit. A local attacker who can open many connections to the user session bus can trigger this and deny service to the desktop session. Flatpak applications can reach the host session bus through the dbus proxy.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-16730"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/bus1/dbus-broker/issues/435"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:61340"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:61355"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:66018"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2026-16730"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2506348"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-755" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-24T12:16:47Z"
  }
}