---
id: CVE-2026-52727
title: lxc-ci contains continuous integration and image-build scripts for LXC
summary: >-
  lxc-ci contains continuous integration and image-build scripts for LXC. Prior
  to the 2026-05-28 Arch Linux image publication, images built from
  images/archlinux.yaml retain the same pacman local-signing private key in
  /etc/pacman.d/gnupg…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-321
vendor: lxc
product: lxc-ci
affected:
  - lxc-ci < 2026-05-28
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T20:16:50.567'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-52727'
references:
  - url: >-
      https://github.com/lxc/lxc-ci/commit/082cb34ea19791a0424feafd9da67b94881ea40a
    label: security-advisories@github.com
  - url: 'https://github.com/lxc/lxc-ci/security/advisories/GHSA-4h59-f67g-5qxp'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-17T19:09:36.526095Z'
ingestedAt: '2026-09-17T19:26:25.315Z'
epss: 0.00594
epssPercentile: 0.46122
---

## Overview

lxc-ci contains continuous integration and image-build scripts for LXC. Prior to the 2026-05-28 Arch Linux image publication, images built from images/archlinux.yaml retain the same pacman local-signing private key in /etc/pacman.d/gnupg and redistribute it to every container or virtual machine created from that image. An attacker who controls an HTTP package mirror or can intercept mirror traffic can use the shared pacman signing private key to sign modified packages that affected clients accept as trusted. Installing those packages permits arbitrary code execution as root on the client system. This issue is fixed in Arch Linux images published on or after 2026-05-28.

## Remediation

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