---
id: CVE-2026-67195
title: >-
  Perspective 5.0.0 contains a remote code execution vulnerability that allows
  unauthenticated attackers to execute arbitrary operating system commands by
  submitting crafted expression strings to the PolarsVirtualServer backend,
  which pass…
summary: >-
  Perspective 5.0.0 contains a remote code execution vulnerability that allows
  unauthenticated attackers to execute arbitrary operating system commands by
  submitting crafted expression strings to the PolarsVirtualServer backend,
  which pass…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-95
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-2026-67195'
references:
  - url: 'https://christbowel.com/blog/perspective-5-0-0-five-cves/'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/perspective-rce-via-eval-expression-injection
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.01193
epssPercentile: 0.66693
ingestedAt: '2026-09-09T21:22:45.522Z'
---

## Overview

Perspective 5.0.0 contains a remote code execution vulnerability that allows unauthenticated attackers to execute arbitrary operating system commands by submitting crafted expression strings to the PolarsVirtualServer backend, which passes client-supplied input directly to Python's eval() with only __builtins__={} cleared. Attackers can exploit Python object attribute traversal through the interpreter's loaded class list to reach subprocess.Popen via a TableValidateExprReq or TableMakeViewReq protobuf message, achieving arbitrary command execution in the Perspective host process.

## Remediation

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