Missing Authorization in PackageKit - CVE-2026-55752
Published: September 10, 2026
Vulnerability identifier: #VU148900
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-55752
CWE-ID: CWE-862
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code with root privileges.
The vulnerability exists due to missing authorization in the alpm install_files_thread handler when processing install-file transactions with the only_download flag. A local user can submit a package containing a post-install scriptlet to execute arbitrary code with root privileges.
Exploitation requires a relaxed SigLevel configuration.
Affected software
PackageKit
How to mitigate CVE-2026-55752
Install security update from vendor's website.
PackageKit - update to 1.4.0