CVE-2026-19816

EUVD-2026-78063 · Published Sep 14, 2026

A flaw was found in PackageKit. PackageKit skips the polkit authorization check for transactions carrying the SIMULATE (dry-run) flag. In the dnf5 backend, the RepoRemove handler ignores that contract and always executes the real transaction because its guard is written as (role == REPO_REMOVE || !SIMULATE), which is always true for RepoRemove. An unprivileged local user can therefore perform a genuine package uninstall while claiming to simulate. This vulnerability only affects systems using PackageKit with the dnf5 backend.

Weaknesses

CWE-863

CVSS scores

v3.17.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

MITRE ATT&CK

Inferred

Where this vulnerability fits in an attack

ReconImpact

Privilege Escalation

T1068Exploitation for Privilege Escalation

References

https://bugzilla.redhat.com/show_bug.cgi?id=2515940
https://github.com/PackageKit/PackageKit/commit/33be77b3ecd3b566ca117358dc18c58c964e627b
https://github.com/PackageKit/PackageKit/security/advisories/GHSA-g5gf-h68q-gxc8

Potentially impacted assets

See if this affects your attack surface

CVE-2026-19816

Weaknesses

CVSS scores

MITRE ATT&CK

References

Potentially impacted assets

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