{"id":"CVE-2026-116161","kind":"vulnerability","aliases":["CVE-2026-116161"],"related":[],"title":"Parse Server: LiveQuery subscriptions with $or leak other users' events","description":"Parse Server before 8.6.103 and 9.0.0 before 9.10.5-alpha.4 contains an information disclosure vulnerability in LiveQuery. Its subscription hash omits constraints next to a $or operator, including the _Session owner filter and beforeSubscribe constraints, so distinct subscriptions are grouped together. Authenticated clients subscribing with $or queries can receive other users' events, including session tokens usable for impersonation.","summary":"Parse Server's LiveQuery groups distinct subscriptions together when they use a $or query, because the subscription hash leaves out some constraints. An authenticated client can therefore receive other users' events, including session tokens that can be used to impersonate those users.","severity":"medium","cvss":6.0,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["livequery","node","package","parse-server","self-hosted"],"not_affected_if":["livequery-disabled","no-authenticated-clients"],"how_to_check":"- Check the installed parse-server version with `npm ls parse-server` and compare it to the fixed versions.\n- Confirm whether LiveQuery is enabled in the server configuration (liveQuery option).","fix":"- Upgrade parse-server to `8.6.103` or later on the 8.x line.\n- Upgrade parse-server to `9.10.5-alpha.4` or later on the 9.x line.","status":"open","published_at":"2026-10-25T14:16:54+00:00","first_seen_at":"2026-10-25T14:41:22+00:00","triaged_at":"2026-10-25T14:42:58+00:00","updated_at":"2026-10-25T14:42:58+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-25T14:42:58Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade parse-server to `8.6.103` or later on the 8.x line.\n- Upgrade parse-server to `9.10.5-alpha.4` or later on the 9.x line.","reach":"internet","title":"Parse Server: LiveQuery subscriptions with $or leak other users' events","impact":"high","summary":"Parse Server's LiveQuery groups distinct subscriptions together when they use a $or query, because the subscription hash leaves out some constraints. An authenticated client can therefore receive other users' events, including session tokens that can be used to impersonate those users.","category":"package","nicknames":[],"who_cares":["parse-server","node","self-hosted","livequery"],"confidence":0.7,"needs_auth":"yes","worst_case":"Other users' session tokens leak, enabling account impersonation.","analyst_note":"Check the Parse Server advisory and fix commit on GitHub to confirm the default LiveQuery setting and which subscription types are affected.","how_to_check":"- Check the installed parse-server version with `npm ls parse-server` and compare it to the fixed versions.\n- Confirm whether LiveQuery is enabled in the server configuration (liveQuery option).","needs_analyst":true,"not_affected_if":["livequery-disabled","no-authenticated-clients"],"who_is_affected":"Applications running Parse Server with LiveQuery enabled, where clients can open subscriptions that use $or queries. The exposure depends on the subscription path and on whether users share a subscription scope; deployments without LiveQuery are not affected. The sources do not say whether default configurations enable LiveQuery.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000635,"input_tokens":3380,"output_tokens":594,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-116161':13A,16A '-2026':12A,15A '8.6.103':71C '9.0.0':73C '9.10.5':75C 'alpha.4':76C 'authent':49B,108C 'beforesubscrib':100C 'client':50B,109C 'constraint':47B,88C,101C 'contain':77C 'cve':11A,14A 'disclosur':80C 'distinct':31B,103C 'event':10A,56B,118C 'filter':98C 'group':30B,106C 'hash':43B,86C 'host':25B 'imperson':65B,124C 'includ':57B,94C,119C 'inform':79C 'leak':7A 'leav':44B 'livequeri':3A,17B,29B,83C 'next':89C 'node':18B 'omit':87C 'oper':93C 'owner':97C 'packag':19B 'pars':1A,21B,26B,68C 'parse-serv':20B 'queri':39B,113C 'receiv':53B,115C 'self':24B 'self-host':23B 'server':2A,22B,27B,69C 'session':58B,96C,120C 'subscrib':110C 'subscript':4A,32B,42B,85C,104C 'therefor':52B 'togeth':33B,107C 'token':59B,121C 'usabl':122C 'use':36B,63B 'user':9A,55B,67B,117C 'vulner':81C","nicknames":[],"mitigations":[],"who_affected":"Applications running Parse Server with LiveQuery enabled, where clients can open subscriptions that use $or queries. The exposure depends on the subscription path and on whether users share a subscription scope; deployments without LiveQuery are not affected. The sources do not say whether default configurations enable LiveQuery.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-25T14:16:54+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/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-2026-116161","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116161","severity":null,"published_at":"2026-10-25T14:16:54+00:00","modified_at":"2026-10-25T14:16:54+00:00","first_seen_at":"2026-10-25T14:41:22+00:00","fetched_at":"2026-10-25T14:41:22+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"}