---
id: CVE-2026-67198
title: >-
  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
summary: >-
  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. Attacker…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-616
published: '2026-08-04'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T20:35:08.537'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67198'
references:
  - url: 'https://christbowel.com/blog/perspective-5-0-0-five-cves/'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/perspective-dos-via-virtualserver-protocol-dispatcher
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00295
epssPercentile: 0.19644
ingestedAt: '2026-09-09T21:22:45.522Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.