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CVE-2026-52727

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

HIGH
7.2
CVSS Score
Published: September 17, 2026 at 06:21 PM UTC
Updated: September 30, 2026 at 05:51 PM UTC
1 product affected across 1 vendorLxc Ci

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Severity
HIGH7.2
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Lxc Ci· Lxc
60%
v < 2026-05-28
Affected range stops below 2026-05-28, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.2HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-321

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