CVE-2026-52727

HIGH 7.2

lxc-ci: Pacman keyring stored in archlinux image with a private key

CVSS Score

7.2

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-321
Vendor	lxc
Product	lxc-ci
Published	Sep 17, 2026
Last Updated	Sep 17, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

lxc / lxc-ci

< 2026-05-28

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/lxc/lxc-ci/security/advisories/GHSA-4h59-f67g-5qxp github.com: https://github.com/lxc/lxc-ci/commit/082cb34ea19791a0424feafd9da67b94881ea40a