{"id":"CVE-2026-19816","title":"A flaw was found in PackageKit","summary":"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 transac…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","cwe":["CWE-863"],"vendor":"Fedora","product":"PackageKit","affected":["PackageKit >= 1.3.4 < 1.4.0","PackageKit >= 1.3.4 < 1.4.0","PackageKit","PackageKit","PackageKit","PackageKit","compat-PackageKit08","PackageKit"],"published":"2026-09-14","updated":"2026-09-18","sourceUpdated":"2026-09-18T19:34:36.657","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-19816","references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2515940","label":"patrick@puiterwijk.org"},{"url":"https://github.com/PackageKit/PackageKit/commit/33be77b3ecd3b566ca117358dc18c58c964e627b","label":"patrick@puiterwijk.org"},{"url":"https://github.com/PackageKit/PackageKit/security/advisories/GHSA-g5gf-h68q-gxc8","label":"patrick@puiterwijk.org"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-19816.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-19816"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-19816"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-19816"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00143,"epssPercentile":0.04011,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-15T17:38:41.601204Z"},"ingestedAt":"2026-09-14T20:14:21.146Z","slug":"CVE-2026-19816","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-19816.json)","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}