{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-19816","assignerOrgId":"92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5","state":"PUBLISHED","assignerShortName":"fedora","dateReserved":"2026-08-14T02:40:21.336Z","datePublished":"2026-09-14T20:05:00.169Z","dateUpdated":"2026-09-15T18:04:51.167Z"},"containers":{"cna":{"title":"PackageKit: dnf5 backend ignores SIMULATE on RepoRemove","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-863","description":"Incorrect Authorization"}]}],"metrics":[{"other":{"content":{"value":"Important","namespace":"https://access.redhat.com/security/updates/classification/"},"type":"Red Hat severity rating"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH"}}],"affected":[{"packageName":"PackageKit","collectionURL":"https://github.com/PackageKit/PackageKit","defaultStatus":"unaffected","modules":["dnf5 backend"],"programFiles":["backends/dnf5/dnf5-backend-thread.cpp","src/pk-transaction.c"],"versions":[{"version":"1.3.4","lessThan":"1.4.0","versionType":"semver","status":"affected"}]},{"vendor":"Fedora","product":"Fedora","packageName":"PackageKit","collectionURL":"https://bodhi.fedoraproject.org/updates/?packages=PackageKit","defaultStatus":"unaffected","modules":["dnf5 backend"],"versions":[{"version":"1.3.4","lessThan":"1.4.0","versionType":"semver","status":"affected"}]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","packageName":"PackageKit","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","defaultStatus":"unaffected","cpes":["cpe:/o:redhat:enterprise_linux:9"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","packageName":"PackageKit","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","defaultStatus":"unaffected","cpes":["cpe:/o:redhat:enterprise_linux:10"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 6","packageName":"PackageKit","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","defaultStatus":"unaffected","cpes":["cpe:/o:redhat:enterprise_linux:6"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 7","packageName":"PackageKit","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","defaultStatus":"unaffected","cpes":["cpe:/o:redhat:enterprise_linux:7"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 7","packageName":"compat-PackageKit08","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","defaultStatus":"unaffected","cpes":["cpe:/o:redhat:enterprise_linux:7"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","packageName":"PackageKit","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","defaultStatus":"unaffected","cpes":["cpe:/o:redhat:enterprise_linux:8"]}],"references":[{"url":"https://github.com/PackageKit/PackageKit/commit/33be77b3ecd3b566ca117358dc18c58c964e627b","tags":["patch"]},{"url":"https://github.com/PackageKit/PackageKit/security/advisories/GHSA-g5gf-h68q-gxc8","tags":["vendor-advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2515940","tags":["issue-tracking"]}],"credits":[{"lang":"en","value":"Vivek Parikh (BreachX Zero Day Labs)"}],"datePublic":"2026-09-09T19:16:02.000Z","providerMetadata":{"orgId":"92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5","shortName":"fedora","dateUpdated":"2026-09-14T20:05:00.169Z"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-15T17:38:41.601204Z","id":"CVE-2026-19816","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-15T18:04:51.167Z"}}]}}