CVE-2026-52727 LXC-ci Arch Linux - Authentication Bypass

LXC-ci Arch Linux images built before 2026-05-28 contain a privilege escalation caused by redistribution of pacman local-signing private key in /etc/pacman.d/gnupg, letting attackers controlling HTTP mirrors execute arbitrary code as root, exploit requires attacker to control or intercept mirror traffic.

CVSS base score 7.2 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.59% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Remote Code Execution, Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Published
17 September 2026
Updated
15 October 2026
Weakness
CWE-321

Vendor fix

Update to Arch Linux images published on or after 2026-05-28.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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