CVE-2026-89677: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-rgqw-p3pf-j5p9
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CVSS 9.8
Published
Advisory Summary

CVE-2026-89677 is a CRITICAL (CVSS 9.8) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-89677 at a Glance

CVE Identifier CVE-2026-89677
GHSA Identifier GHSA-rgqw-p3pf-j5p9
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

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:H/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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-89677

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-2026-89677, 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: nfsd: fix possible fh_compose of wrong dentry in nfsd4_create_file() dentry_create() can hypothetically provide a different dentry than the one passed in. This could happen, for example, if the exported filesystem is NFS, and the server returned to OPEN a filehandle which matched a directory that was already in the dcache. Clearly this would not be expected! If this were to happen the dentry (child) that was already stored in resfhp could be freed and later dereferenced. We shouldn't call fh_compose() until we are certain that we have the final dentry, so this patch moved the fh_compose() call to two places: one for the case where the target already exists, and one after dentry_create() where it was created.

References

NVD — CVE-2026-89677 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89677
git.kernel.org/stable/c/033e783709... WEB
https://git.kernel.org/stable/c/033e783709ce99662cf81f6abcad746a8da9d35f
git.kernel.org/stable/c/3e2c79360c... WEB
https://git.kernel.org/stable/c/3e2c79360c6a89975ec5b5a7d4ef937e4db91a27

Frequently Asked Questions

What is CVE-2026-89677?
CVE-2026-89677 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-2026-89677?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89677?
CVE-2026-89677 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-89677?
CVE-2026-89677 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89677?
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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  "id" : "GHSA-rgqw-p3pf-j5p9",
  "modified" : "2026-09-13T09:32:27Z",
  "published" : "2026-09-11T21:31:36Z",
  "aliases" : [ "CVE-2026-89677" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: fix possible fh_compose of wrong dentry in nfsd4_create_file()\n\ndentry_create() can hypothetically provide a different dentry than the\none passed in.  This could happen, for example, if the exported\nfilesystem is NFS, and the server returned to OPEN a filehandle which\nmatched a directory that was already in the dcache.  Clearly this would\nnot be expected!\n\nIf this were to happen the dentry (child) that was already stored in\nresfhp could be freed and later dereferenced.\n\nWe shouldn't call fh_compose() until we are certain that we have the\nfinal dentry, so this patch moved the fh_compose() call to two places:\none for the case where the target already exists, and one after\ndentry_create() where it was created.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
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  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89677"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/033e783709ce99662cf81f6abcad746a8da9d35f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3e2c79360c6a89975ec5b5a7d4ef937e4db91a27"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T20:19:54Z"
  }
}