{"id":"CVE-2026-111253","kind":"vulnerability","aliases":["CVE-2026-111253"],"related":[],"title":"dnf5daemon-server: local users can swap a session's package transaction plan","description":"A flaw was found in dnf5daemon-server. Session methods on dynamically exported D-Bus session objects do not verify that the caller is the unique sender that created the session. A local attacker can modify another user's live package-management session and replace its resolved transaction plan. If the legitimate session party later authorizes execution, the root daemon may apply the attacker-chosen package operations.","summary":"dnf5daemon-server does not check that the caller of a D-Bus session method is the user who created the session. A local attacker can replace another user's resolved package transaction, and if that user later authorizes it, the root daemon may install or remove attacker-chosen packages.","severity":"medium","cvss":6.6,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["dbus","dnf5","fedora","infrastructure","linux","rhel"],"not_affected_if":["daemon-not-installed","no-local-untrusted-users"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-05T17:17:37+00:00","first_seen_at":"2026-11-05T17:40:03+00:00","triaged_at":"2026-11-05T17:42:31+00:00","updated_at":"2026-11-05T17:42:31+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-05T17:42:31Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"dnf5daemon-server: local users can swap a session's package transaction plan","impact":"high","summary":"dnf5daemon-server does not check that the caller of a D-Bus session method is the user who created the session. A local attacker can replace another user's resolved package transaction, and if that user later authorizes it, the root daemon may install or remove attacker-chosen packages.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["fedora","rhel","dnf5","linux","dbus"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"root daemon applies attacker-chosen package operations after user authorizes","analyst_note":"Check the NVD entry and the linked Patch reference for affected and fixed dnf5daemon-server versions and default install status.","how_to_check":"unknown","plain_action":"","needs_analyst":true,"not_affected_if":["daemon-not-installed","no-local-untrusted-users"],"who_is_affected":"Systems running dnf5daemon-server, the D-Bus service behind dnf5 package management, where a local user can reach the system bus. The sources do not state affected versions or whether default installs run the daemon. Machines with no local untrusted users and the daemon not installed can skip it.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000669,"input_tokens":4234,"output_tokens":492,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-111253':16A,19A '-2026':15A,18A 'anoth':54B,115C 'appli':141C 'attack':51B,75B,112C,144C 'attacker-chosen':74B,143C 'author':65B,135C 'bus':39B,93C 'caller':34B,101C 'check':31B 'chosen':76B,145C 'creat':46B,107C 'cve':14A,17A 'd':38B,92C 'd-bus':37B,91C 'daemon':69B,139C 'dbus':20B 'dnf5':21B 'dnf5daemon':2A,27B,84C 'dnf5daemon-server':1A,26B,83C 'dynam':89C 'execut':136C 'export':90C 'fedora':22B 'flaw':79C 'found':81C 'infrastructur':23B 'instal':71B 'later':64B,134C 'legitim':131C 'linux':24B 'live':118C 'local':4A,50B,111C 'manag':121C 'may':70B,140C 'method':41B,87C 'modifi':114C 'object':95C 'oper':147C 'packag':11A,58B,77B,120C,146C 'package-manag':119C 'parti':133C 'plan':13A,128C 'remov':73B 'replac':53B,124C 'resolv':57B,126C 'rhel':25B 'root':68B,138C 'sender':105C 'server':3A,28B,85C 'session':9A,40B,48B,86C,94C,109C,122C,132C 'swap':7A 'transact':12A,59B,127C 'uniqu':104C 'user':5A,44B,55B,63B,116C 'verifi':98C","nicknames":[],"mitigations":[],"who_affected":"Systems running dnf5daemon-server, the D-Bus service behind dnf5 package management, where a local user can reach the system bus. The sources do not state affected versions or whether default installs run the daemon. Machines with no local untrusted users and the daemon not installed can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["dbus","dnf5","fedora","infrastructure","linux","medium","rhel"],"campaign_type":null,"first_public_at":"2026-11-05T17:17:37+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H","cvss_by":"patrick@puiterwijk.org","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-111253","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111253","severity":null,"published_at":"2026-11-05T17:17:37+00:00","modified_at":"2026-11-05T17:17:37+00:00","first_seen_at":"2026-11-05T17:40:03+00:00","fetched_at":"2026-11-05T17:40:03+00:00","note":null}],"documents":[{"id":78084,"url":"https://github.com/rpm-software-management/dnf5/commit/46a4a8ad8d34af91ec2add6bb29e487571ea6c85","title":"Patch: github.com","kind":"other","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Patch: github.com"}],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}