CVE-2026-89711: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-f2q5-7q65-xqx7
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CVSS 8.2
Published
Advisory Summary

CVE-2026-89711 is a HIGH (CVSS 8.2) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-89711 at a Glance

CVE Identifier CVE-2026-89711
GHSA Identifier GHSA-f2q5-7q65-xqx7
Severity HIGH
CVSS v3.1 Base Score 8.2
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 8.2

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

How to Fix CVE-2026-89711

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-2026-89711, 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: remove flawed WARN_ON_ONCE from nfsd_mode_check The header for commit e75b23f9e323 ("nfsd: check d_can_lookup in fh_verify of directories") details the assumption that justified adding the WARN_ON_ONCE to nfsd_mode_check(), that assumption is invalid (in the case of NFS reexport). When NFSD exports an NFS filesystem it is very possible for nfsd_mode_check() to encounter a @dentry that doesn't have i_op->lookup (see nfs_fhget()'s NFS_ATTR_FATTR_MOUNTPOINT and NFS_ATTR_FATTR_V4_REFERRAL handling, and d_flags_for_inode()). So remove nfsd_mode_check()'s WARN_ON_ONCE(). The nfserr_notdir return on that branch must stay. It guards the subsequent lookup_one_unlocked() -> __lookup_slow() path, which calls inode->i_op->lookup() with no NULL check, so returning nfserr_notdir is what keeps a client LOOKUP into such a @dentry from dereferencing a NULL method pointer.

References

NVD — CVE-2026-89711 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89711
git.kernel.org/stable/c/2ef1313239... WEB
https://git.kernel.org/stable/c/2ef131323999539038e306773c8256403834361b
git.kernel.org/stable/c/7ef182a8fe... WEB
https://git.kernel.org/stable/c/7ef182a8fe9c12b0d936880b1e504840639aa009
git.kernel.org/stable/c/9f4434893a... WEB
https://git.kernel.org/stable/c/9f4434893a2783f7384d993cea883aff3fb7a52d
git.kernel.org/stable/c/a275de3bac... WEB
https://git.kernel.org/stable/c/a275de3bac5635514ca830f2e46b5ff0e66b5c4c
git.kernel.org/stable/c/aa0cf48a44... WEB
https://git.kernel.org/stable/c/aa0cf48a448c5a9fe1a1e880899ecd589ce39e6e
git.kernel.org/stable/c/ae251937c6... WEB
https://git.kernel.org/stable/c/ae251937c6f0237e5b555a5e4ba4595b8206e865
git.kernel.org/stable/c/b55b4d880b... WEB
https://git.kernel.org/stable/c/b55b4d880bb080fa10eb08ba21a5d8679b8102fe
git.kernel.org/stable/c/e145e8d67a... WEB
https://git.kernel.org/stable/c/e145e8d67a5d41c72d322e7f87ab474d39d9dfb7

Frequently Asked Questions

What is CVE-2026-89711?
CVE-2026-89711 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-2026-89711?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89711?
CVE-2026-89711 has a CVSS v3.1 base score of 8.2 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.
What CWE is associated with CVE-2026-89711?
CVE-2026-89711 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89711?
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-f2q5-7q65-xqx7",
  "modified" : "2026-09-14T15:32:34Z",
  "published" : "2026-09-11T21:31:37Z",
  "aliases" : [ "CVE-2026-89711" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: remove flawed WARN_ON_ONCE from nfsd_mode_check\n\nThe header for commit e75b23f9e323 (\"nfsd: check d_can_lookup in\nfh_verify of directories\") details the assumption that justified\nadding the WARN_ON_ONCE to nfsd_mode_check(), that assumption is\ninvalid (in the case of NFS reexport).\n\nWhen NFSD exports an NFS filesystem it is very possible for\nnfsd_mode_check() to encounter a @dentry that doesn't have\ni_op->lookup (see nfs_fhget()'s NFS_ATTR_FATTR_MOUNTPOINT and\nNFS_ATTR_FATTR_V4_REFERRAL handling, and d_flags_for_inode()).\n\nSo remove nfsd_mode_check()'s WARN_ON_ONCE(). The nfserr_notdir\nreturn on that branch must stay. It guards the subsequent\nlookup_one_unlocked() -> __lookup_slow() path, which calls\ninode->i_op->lookup() with no NULL check, so returning nfserr_notdir\nis what keeps a client LOOKUP into such a @dentry from dereferencing\na NULL method pointer.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89711"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/2ef131323999539038e306773c8256403834361b"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/7ef182a8fe9c12b0d936880b1e504840639aa009"
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9f4434893a2783f7384d993cea883aff3fb7a52d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a275de3bac5635514ca830f2e46b5ff0e66b5c4c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/aa0cf48a448c5a9fe1a1e880899ecd589ce39e6e"
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ae251937c6f0237e5b555a5e4ba4595b8206e865"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b55b4d880bb080fa10eb08ba21a5d8679b8102fe"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e145e8d67a5d41c72d322e7f87ab474d39d9dfb7"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T20:19:58Z"
  }
}