CVE-2026-52727

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

Published: Sep 17, 2026Updated: Sep 17, 2026 Sources: CVE List NVDCWE-321

7.2HIGH

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:HPrivileges Required

High

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-321

Affected Products

lxc

oss-projectaka lxc container

lxc-ciMixed

Cloud & SaaS / container-orchestration

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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References

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

github.com

https://github.com/lxc/lxc-ci/commit/082cb34ea19791a0424feafd9da67b94881ea40a

github.com

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