# CVE-2026-19816

## Summary

- **CVE ID:** CVE-2026-19816
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H)
- **CWE:** CWE-863
- **Published:** Sep 14, 2026
- **Last Modified:** Sep 15, 2026

## Description

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.

## Affected Products

- Unknown product (1.3.4)
- Fedora — Fedora (1.3.4)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.14%
- **EPSS Percentile:** 4.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._