---
id: CVE-2026-16527
title: >-
  An unauthenticated remote attacker can bypass access controls by sending
  crafted requests to the PCP pmproxy /store endpoint
summary: >-
  An unauthenticated remote attacker can bypass access controls by sending
  crafted requests to the PCP pmproxy /store endpoint. This allows the attacker
  to overwrite any PMDA metric, leading to arbitrary code execution and system
  takeover.
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-284
published: '2026-07-30'
updated: '2026-07-31'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-16527'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-16527'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2506031'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00498
epssPercentile: 0.40107
ingestedAt: '2026-08-01T21:14:39.653Z'
---

## Overview

An unauthenticated remote attacker can bypass access controls by sending crafted requests to the PCP pmproxy /store endpoint. This allows the attacker to overwrite any PMDA metric, leading to arbitrary code execution and system takeover.

## Remediation

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