CVE-2026-11331: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-8p39-mp4q-99c8
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CVSS 7.5
CWE-790
Published
Advisory Summary

CVE-2026-11331 is a HIGH (CVSS 7.5) security vulnerability vulnerability (CWE-790: Improper Filtering of Special Elements) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product receives data from an upstream component, but does not filter or incorrectly filters special elements before sending it to a downstream component.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-11331 at a Glance

CVE Identifier CVE-2026-11331
GHSA Identifier GHSA-8p39-mp4q-99c8
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-790: Improper Filtering of Special Elements
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:H/I:N/A:N).

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

How to Fix CVE-2026-11331

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-2026-11331, 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-790: Improper Filtering of Special Elements, where the product receives data from an upstream component, but does not filter or incorrectly filters special elements before sending it to a downstream component. 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

An attacker who knows (or guesses) that a resolver uses RPZ with wildcard CNAME policies can craft query names long enough to trigger a NAMETOOLONG error condition during RPZ processing. This is not handled correctly and may lead to defeating the RPZ rule. It also may lead to an unexpected exit of the BIND 9 software. This issue affects BIND 9 versions 9.16.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.16.8-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.

References

NVD — CVE-2026-11331 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-11331
downloads.isc.org/isc/bind9/9.20.26 WEB
https://downloads.isc.org/isc/bind9/9.20.26
downloads.isc.org/isc/bind9/9.21.24 WEB
https://downloads.isc.org/isc/bind9/9.21.24
kb.isc.org/docs/cve-2026-11331 WEB
https://kb.isc.org/docs/cve-2026-11331

Frequently Asked Questions

What is CVE-2026-11331?
CVE-2026-11331 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-790: Improper Filtering of Special Elements.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-11331?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-11331?
CVE-2026-11331 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:H/I:N/A:N.
What CWE is associated with CVE-2026-11331?
CVE-2026-11331 is classified under CWE-790: Improper Filtering of Special Elements (The product receives data from an upstream component, but does not filter or incorrectly filters special elements before sending it to a downstream component.).
How can I check Maven dependencies for CVE-2026-11331?
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-8p39-mp4q-99c8",
  "modified" : "2026-07-22T15:31:26Z",
  "published" : "2026-07-22T15:31:26Z",
  "aliases" : [ "CVE-2026-11331" ],
  "details" : "An attacker who knows (or guesses) that a resolver uses RPZ with wildcard CNAME policies can craft query names long enough to trigger a NAMETOOLONG error condition during RPZ processing. This is not handled correctly and may lead to defeating the RPZ rule. It also may lead to an unexpected exit of the BIND 9 software.\nThis issue affects BIND 9 versions 9.16.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.16.8-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-11331"
  }, {
    "type" : "WEB",
    "url" : "https://downloads.isc.org/isc/bind9/9.20.26"
  }, {
    "type" : "WEB",
    "url" : "https://downloads.isc.org/isc/bind9/9.21.24"
  }, {
    "type" : "WEB",
    "url" : "https://kb.isc.org/docs/cve-2026-11331"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-790" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-22T15:16:51Z"
  }
}