CVE-2026-89476: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-p69r-6fx2-qv4w
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CVSS 7.5
Published
Advisory Summary

CVE-2026-89476 is a HIGH (CVSS 7.5) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-89476 at a Glance

CVE Identifier CVE-2026-89476
GHSA Identifier GHSA-p69r-6fx2-qv4w
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification General Security Weakness
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-2026-89476

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-2026-89476, 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 General Security Weakness. 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

In the Linux kernel, the following vulnerability has been resolved: sctp: fix stream->outcnt underflow on duplicate RECONF responses A cached RECONF chunk may contain more than one request parameter. A duplicate response can therefore find and process the same ADD_OUT request again while another parameter is still outstanding, rolling back outcnt twice and possibly underflowing it. Track outstanding request types as bits and clear each bit after its first response. Later responses for the same request are then ignored.

References

NVD — CVE-2026-89476 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89476
git.kernel.org/stable/c/041f7df5a9... WEB
https://git.kernel.org/stable/c/041f7df5a929d3e7435dd8387e8ea17f2d412b7d
git.kernel.org/stable/c/092acd3c55... WEB
https://git.kernel.org/stable/c/092acd3c55a4077b00489064615d8d2d898daf91
git.kernel.org/stable/c/2d867663c5... WEB
https://git.kernel.org/stable/c/2d867663c563e8009257b9edf9c8ec75d9bbf19a
git.kernel.org/stable/c/3faf13aff2... WEB
https://git.kernel.org/stable/c/3faf13aff243ca9f78d08b1a2956ef5a6fc77b6e
git.kernel.org/stable/c/59f61c39cb... WEB
https://git.kernel.org/stable/c/59f61c39cb99ee1737bd742a20094fe5653389bb
git.kernel.org/stable/c/793519e343... WEB
https://git.kernel.org/stable/c/793519e343867ee9a3e84f6cac07f81f2aec7b5d
git.kernel.org/stable/c/8320cbd81b... WEB
https://git.kernel.org/stable/c/8320cbd81bc21a1ca6ebdf70ad610ebc5ef1bd68
git.kernel.org/stable/c/d02a5794c3... WEB
https://git.kernel.org/stable/c/d02a5794c3deedcb8476d017fcee2b7aaedab2e1

Frequently Asked Questions

What is CVE-2026-89476?
CVE-2026-89476 is a security vulnerability in Software classified as a security vulnerability vulnerability under General Security Weakness.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-89476?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89476?
CVE-2026-89476 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-2026-89476?
CVE-2026-89476 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89476?
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 
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  "schema_version" : "1.4.0",
  "id" : "GHSA-p69r-6fx2-qv4w",
  "modified" : "2026-09-14T15:32:25Z",
  "published" : "2026-09-11T21:31:28Z",
  "aliases" : [ "CVE-2026-89476" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix stream->outcnt underflow on duplicate RECONF responses\n\nA cached RECONF chunk may contain more than one request parameter.  A\nduplicate response can therefore find and process the same ADD_OUT request\nagain while another parameter is still outstanding, rolling back outcnt\ntwice and possibly underflowing it.\n\nTrack outstanding request types as bits and clear each bit after its first\nresponse.  Later responses for the same request are then ignored.",
  "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-2026-89476"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/041f7df5a929d3e7435dd8387e8ea17f2d412b7d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/092acd3c55a4077b00489064615d8d2d898daf91"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/2d867663c563e8009257b9edf9c8ec75d9bbf19a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3faf13aff243ca9f78d08b1a2956ef5a6fc77b6e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/59f61c39cb99ee1737bd742a20094fe5653389bb"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/793519e343867ee9a3e84f6cac07f81f2aec7b5d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/8320cbd81bc21a1ca6ebdf70ad610ebc5ef1bd68"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d02a5794c3deedcb8476d017fcee2b7aaedab2e1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T20:19:28Z"
  }
}