What is CVE-2026-52727?

CVE-2026-52727 is a high-severity vulnerability in Lxc Lxc-Ci, classified under Use of Hard-coded Cryptographic Key. CVSS score: 7.2/10. Published 2026-09-17.

How severe is CVE-2026-52727?

High severity. CVSS v3 base score is 7.2 out of 10.

Vulnerability in Lxc Lxc-Ci

CVE-2026-52727

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.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Lxc Lxc-ci — versions < 2026-05-28

Weakness classification (CWE)

CWE-321 — Use of Hard-coded Cryptographic Key

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-52727?: CVE-2026-52727 is a high-severity vulnerability in Lxc Lxc-Ci, classified under Use of Hard-coded Cryptographic Key. CVSS score: 7.2/10. Published 2026-09-17.
How severe is CVE-2026-52727?: High severity. CVSS v3 base score is 7.2 out of 10.