CVE-2026-67198: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-pr84-483f-rmg2
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CVSS 7.5
CWE-616
Published
Advisory Summary

CVE-2026-67198 is a HIGH (CVSS 7.5) security vulnerability vulnerability (CWE-616: Incomplete Identification of Uploaded File Variables (PHP)) affecting Software libraries in the Maven ecosystem. The weakness occurs when the php application uses an old method for processing uploaded files by referencing the four global variables that are set for each file (e.g. $varname, $varname_size, $varname_name, $varname_type). these variables could be overwritten by attackers, causing the application to process unauthorized files.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-67198 at a Glance

CVE Identifier CVE-2026-67198
GHSA Identifier GHSA-pr84-483f-rmg2
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-616: Incomplete Identification of Uploaded File Variables (PHP)
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-2026-67198

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-2026-67198, 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-616: Incomplete Identification of Uploaded File Variables (PHP), where the php application uses an old method for processing uploaded files by referencing the four global variables that are set for each file (e.g. $varname, $varname_size, $varname_name, $varname_type). these variables could be overwritten by attackers, causing the application to process unauthorized files. 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

Perspective 5.0.0 contains a denial-of-service vulnerability in the VirtualServer protocol dispatcher that allows unauthenticated remote attackers to crash the server process by sending malformed or incomplete protobuf messages. Attackers can send well-formed requests such as ViewToArrowReq with no viewport set or MakeTableReq with no data field to trigger unwrap() calls on None values at nine distinct sites, causing the process to abort with SIGABRT.

References

NVD — CVE-2026-67198 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-67198
christbowel.com/blog/perspective-5-... WEB
https://christbowel.com/blog/perspective-5-0-0-five-cves
www.vulncheck.com/advisories/perspect... WEB
https://www.vulncheck.com/advisories/perspective-dos-via-virtualserver-protocol-dispatcher

Frequently Asked Questions

What is CVE-2026-67198?
CVE-2026-67198 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-616: Incomplete Identification of Uploaded File Variables (PHP).
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-67198?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-67198?
CVE-2026-67198 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-2026-67198?
CVE-2026-67198 is classified under CWE-616: Incomplete Identification of Uploaded File Variables (PHP) (The PHP application uses an old method for processing uploaded files by referencing the four global variables that are set for each file (e.g. $varname, $varname_size, $varname_name, $varname_type). These variables could be overwritten by attackers, causing the application to process unauthorized files.).
How can I check Maven dependencies for CVE-2026-67198?
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-pr84-483f-rmg2",
  "modified" : "2026-08-04T15:32:23Z",
  "published" : "2026-08-04T15:32:23Z",
  "aliases" : [ "CVE-2026-67198" ],
  "details" : "Perspective 5.0.0 contains a denial-of-service vulnerability in the VirtualServer protocol dispatcher that allows unauthenticated remote attackers to crash the server process by sending malformed or incomplete protobuf messages. Attackers can send well-formed requests such as ViewToArrowReq with no viewport set or MakeTableReq with no data field to trigger unwrap() calls on None values at nine distinct sites, causing the process to abort with SIGABRT.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-67198"
  }, {
    "type" : "WEB",
    "url" : "https://christbowel.com/blog/perspective-5-0-0-five-cves"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/perspective-dos-via-virtualserver-protocol-dispatcher"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-616" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-04T15:16:40Z"
  }
}