{"id":"CVE-2026-117606","kind":"vulnerability","aliases":["CVE-2026-117606"],"related":[],"title":"NexoPOS: cashiers can alter other cashiers' register sessions and balances","description":"NexoPOS through 6.3.0 contains a missing authorization vulnerability that allows authenticated cashiers to manipulate other cashiers' register sessions because CashRegistersService never compares used_by with the user. Attackers holding the default nexopos.use.registers permission can submit closing, cash-in, or cash-out actions to POST /api/cash-registers/{action}/{register} to force-close sessions or alter balances.","summary":"NexoPOS through 6.3.0 does not check whether a register session belongs to the requesting cashier, so any authenticated cashier with the default register permission can close or change another cashier's session. An attacker can force-close sessions and alter cash balances through the cash-registers API.","severity":"medium","cvss":5.4,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["nexopos","package","point-of-sale","self-hosted"],"not_affected_if":["auth-required","single-user"],"how_to_check":"- Check the installed NexoPOS version and confirm whether it is `6.3.0` or earlier.\n- Review whether cashiers hold the `nexopos.use.registers` permission, which is granted by default.","fix":null,"status":"open","published_at":"2026-10-28T03:17:12+00:00","first_seen_at":"2026-10-28T03:31:02+00:00","triaged_at":"2026-10-28T03:32:48+00:00","updated_at":"2026-10-28T03:32:48+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-28T03:32:48Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"internet","title":"NexoPOS: cashiers can alter other cashiers' register sessions and balances","impact":"medium","summary":"NexoPOS through 6.3.0 does not check whether a register session belongs to the requesting cashier, so any authenticated cashier with the default register permission can close or change another cashier's session. An attacker can force-close sessions and alter cash balances through the cash-registers API.","category":"package","nicknames":[],"who_cares":["nexopos","self-hosted","point-of-sale"],"confidence":0.7,"needs_auth":"yes","worst_case":"Other cashiers' register sessions get force-closed and cash balances get altered.","analyst_note":"Fixed version is not stated in the sources; check the NexoPOS release notes or the NVD entry for the first patched release.","how_to_check":"- Check the installed NexoPOS version and confirm whether it is `6.3.0` or earlier.\n- Review whether cashiers hold the `nexopos.use.registers` permission, which is granted by default.","needs_analyst":true,"not_affected_if":["auth-required","single-user"],"who_is_affected":"Deployments of NexoPOS 6.3.0 and earlier where cashiers have accounts and the default register permission. The flaw requires a valid cashier login, so teams with no multi-user cashier accounts face little exposure. Single-operator installs are unlikely to be affected.","user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000598,"input_tokens":3360,"output_tokens":523,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-117606':13A,16A '-2026':12A,15A '/api/cash-registers':121C '6.3.0':28B,77C 'action':118C,122C 'allow':84C 'alter':4A,66B,130C 'anoth':54B 'api':74B 'attack':59B,102C 'authent':43B,85C 'author':81C 'balanc':10A,68B,131C 'belong':36B 'cash':67B,72B,112C,116C 'cash-in':111C 'cash-out':115C 'cash-regist':71B 'cashier':2A,6A,40B,44B,55B,86C,90C 'cashregistersservic':94C 'chang':53B 'check':31B 'close':51B,63B,110C,127C 'compar':96C 'contain':78C 'cve':11A,14A 'default':47B,105C 'forc':62B,126C 'force-clos':61B,125C 'hold':103C 'host':25B 'manipul':88C 'miss':80C 'never':95C 'nexopo':1A,17B,26B,75C 'nexopos.use.registers':106C 'packag':18B 'permiss':49B,107C 'point':20B 'point-of-sal':19B 'post':120C 'regist':7A,34B,48B,73B,91C,123C 'request':39B 'sale':22B 'self':24B 'self-host':23B 'session':8A,35B,57B,64B,92C,128C 'submit':109C 'use':97C 'user':101C 'vulner':82C 'whether':32B","nicknames":[],"mitigations":[],"who_affected":"Deployments of NexoPOS 6.3.0 and earlier where cashiers have accounts and the default register permission. The flaw requires a valid cashier login, so teams with no multi-user cashier accounts face little exposure. Single-operator installs are unlikely to be affected.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-28T03:17:12+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-117606","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-117606","severity":null,"published_at":"2026-10-28T03:17:12+00:00","modified_at":"2026-10-28T03:17:12+00:00","first_seen_at":"2026-10-28T03:31:02+00:00","fetched_at":"2026-10-28T03:31:02+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}