CVE-2026-8673: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-v88w-jgrg-7946
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CVSS 5.9
CWE-523
Published
Advisory Summary

CVE-2026-8673 is a MODERATE (CVSS 5.9) security vulnerability vulnerability (CWE-523: Unprotected Transport of Credentials) affecting Software libraries in the Maven ecosystem. The weakness occurs when login pages do not use adequate measures to protect the user name and password while they are in transit from the client to the server.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-8673 at a Glance

CVE Identifier CVE-2026-8673
GHSA Identifier GHSA-v88w-jgrg-7946
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-523: Unprotected Transport of Credentials
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.9

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required High (PR:H)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2026-8673

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-2026-8673, 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-523: Unprotected Transport of Credentials, where login pages do not use adequate measures to protect the user name and password while they are in transit from the client to the server. 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

Unprotected transport of credentials vulnerability in syslink software AG Avantra on Linux, Windows allows Sniffing Attacks. This issue affects Avantra: before 25.3.0.

References

NVD — CVE-2026-8673 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-8673
support.avantra.com/hc/en-us/articles/5... WEB
https://support.avantra.com/hc/en-us/articles/5535621927071

Frequently Asked Questions

What is CVE-2026-8673?
CVE-2026-8673 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-523: Unprotected Transport of Credentials.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-8673?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-8673?
CVE-2026-8673 has a CVSS v3.1 base score of 5.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2026-8673?
CVE-2026-8673 is classified under CWE-523: Unprotected Transport of Credentials (Login pages do not use adequate measures to protect the user name and password while they are in transit from the client to the server.).
How can I check Maven dependencies for CVE-2026-8673?
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-v88w-jgrg-7946",
  "modified" : "2026-05-26T13:30:17Z",
  "published" : "2026-05-26T13:30:17Z",
  "aliases" : [ "CVE-2026-8673" ],
  "details" : "Unprotected transport of credentials vulnerability in syslink software AG Avantra on Linux, Windows allows Sniffing Attacks.\n\nThis issue affects Avantra: before 25.3.0.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-8673"
  }, {
    "type" : "WEB",
    "url" : "https://support.avantra.com/hc/en-us/articles/5535621927071"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-523" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-05-22T14:16:30Z"
  }
}