CVE-2026-86589: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-9w3m-gv8w-f7ww
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CWE-303
Published
Advisory Summary

CVE-2026-86589 is a security vulnerability vulnerability (CWE-303: Incorrect Implementation of Authentication Algorithm) affecting Software libraries in the Maven ecosystem. The weakness occurs when the requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-86589 at a Glance

CVE Identifier CVE-2026-86589
GHSA Identifier GHSA-9w3m-gv8w-f7ww
Severity N/A
CVSS v3.1 Base Score N/A
CWE Classification CWE-303: Incorrect Implementation of Authentication Algorithm
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-86589

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-2026-86589, 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-303: Incorrect Implementation of Authentication Algorithm, where the requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect. 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

Incorrect implementation of authentication algorithm vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. A flaw in the User Center login integration can cause a newly created external user session to omit its external identity, allowing subsequent requests to bypass central account suspension or deletion checks until the session expires or is revoked. Users are recommended to upgrade to version 2.0.3, which fixes the issue.

References

NVD — CVE-2026-86589 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-86589
lists.apache.org/thread/t8mbzfolzlqz... WEB
https://lists.apache.org/thread/t8mbzfolzlqz4z5hcwq3v0lnwjqb2tl5
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/10/16/33

Frequently Asked Questions

What is CVE-2026-86589?
CVE-2026-86589 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-303: Incorrect Implementation of Authentication Algorithm.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-86589?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-86589?
CVE-2026-86589 is classified under CWE-303: Incorrect Implementation of Authentication Algorithm (The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect.).
How can I check Maven dependencies for CVE-2026-86589?
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-9w3m-gv8w-f7ww",
  "modified" : "2026-10-19T12:32:48Z",
  "published" : "2026-10-19T12:32:48Z",
  "aliases" : [ "CVE-2026-86589" ],
  "details" : "Incorrect implementation of authentication algorithm vulnerability in Apache Answer.\n\n\n\nThis issue affects Apache Answer: through 2.0.2.\n\n\n\nA flaw in the User Center login integration can cause a newly created external user session to omit its external identity, allowing subsequent requests to bypass central account suspension or deletion checks until the session\n  expires or is revoked.\n\n\n\nUsers are recommended to upgrade to version 2.0.3, which fixes the issue.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-86589"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/t8mbzfolzlqz4z5hcwq3v0lnwjqb2tl5"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/10/16/33"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-303" ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-19T10:16:49Z"
  }
}