{"id":"CVE-2026-116018","kind":"vulnerability","aliases":["CVE-2026-116018"],"related":[],"title":"ONEARMY community-platform: authenticated users can mark others' notifications read","description":"ONEARMY community-platform before 2.165.2 contains an insecure direct object reference vulnerability that allows authenticated users to mark other users' notifications as read via POST /api/notifications/:id/read. Attackers can iterate sequential notification IDs to suppress unread indicators of users in the same tenant, causing them to miss replies, comments and new-content notices.","summary":"ONEARMY community-platform before 2.165.2 lets any logged-in user call POST /api/notifications/:id/read on notification IDs that belong to other users. An attacker can iterate sequential IDs to silently clear other users' unread notifications, so they miss replies and comments.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["community-platform","multi-tenant","other","self-hosted"],"not_affected_if":["already-patched","single-user"],"how_to_check":"- Check the installed community-platform version and see whether it is below `2.165.2`.\n- Review whether `POST /api/notifications/:id/read` verifies that the notification belongs to the requesting user.","fix":"- Upgrade community-platform to `2.165.2` or later.","status":"open","published_at":"2026-10-24T12:16:58+00:00","first_seen_at":"2026-10-24T12:47:58+00:00","triaged_at":"2026-10-25T04:18:41+00:00","updated_at":"2026-10-25T04:18:41+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-10-25T04:18:41Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade community-platform to `2.165.2` or later.","reach":"internet","title":"ONEARMY community-platform: authenticated users can mark others' notifications read","impact":"low","summary":"ONEARMY community-platform before 2.165.2 lets any logged-in user call POST /api/notifications/:id/read on notification IDs that belong to other users. An attacker can iterate sequential IDs to silently clear other users' unread notifications, so they miss replies and comments.","category":"other","nicknames":[],"who_cares":["community-platform","self-hosted","multi-tenant"],"confidence":0.7,"needs_auth":"yes","worst_case":"other users' unread notifications get silently marked as read","analyst_note":"","how_to_check":"- Check the installed community-platform version and see whether it is below `2.165.2`.\n- Review whether `POST /api/notifications/:id/read` verifies that the notification belongs to the requesting user.","needs_analyst":false,"not_affected_if":["already-patched","single-user"],"who_is_affected":"Teams running ONEARMY community-platform before 2.165.2 with multiple user accounts in one tenant. The flaw needs only a regular authenticated account, so any deployment with open or self-service sign-up is exposed. Single-user deployments and anyone already on 2.165.2 or later can skip it.","user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000583,"input_tokens":3338,"output_tokens":499,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-116018':14A,17A '-2026':13A,16A '/api/notifications':42B,97C '2.165.2':33B,76C 'allow':85C 'attack':53B,99C 'authent':5A,86C 'belong':48B 'call':40B 'caus':115C 'clear':60B 'comment':70B,120C 'communiti':3A,19B,30B,73C 'community-platform':2A,18B,29B,72C 'contain':77C 'content':124C 'cve':12A,15A 'direct':80C 'host':27B 'id':46B,57B,104C 'id/read':43B,98C 'indic':108C 'insecur':79C 'iter':55B,101C 'let':34B 'log':37B 'logged-in':36B 'mark':8A,89C 'miss':67B,118C 'multi':22B 'multi-ten':21B 'new':123C 'new-cont':122C 'notic':125C 'notif':10A,45B,64B,92C,103C 'object':81C 'onearmi':1A,28B,71C 'other':9A 'platform':4A,20B,31B,74C 'post':41B,96C 'read':11A,94C 'refer':82C 'repli':68B,119C 'self':26B 'self-host':25B 'sequenti':56B,102C 'silent':59B 'suppress':106C 'tenant':23B,114C 'unread':63B,107C 'user':6A,39B,51B,62B,87C,91C,110C 'via':95C 'vulner':83C","nicknames":[],"mitigations":[],"who_affected":"Teams running ONEARMY community-platform before 2.165.2 with multiple user accounts in one tenant. The flaw needs only a regular authenticated account, so any deployment with open or self-service sign-up is exposed. Single-user deployments and anyone already on 2.165.2 or later can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-24T12:16:58+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/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-2026-116018","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116018","severity":null,"published_at":"2026-10-24T12:16:58+00:00","modified_at":"2026-10-24T12:16:58+00:00","first_seen_at":"2026-10-24T12:47:58+00:00","fetched_at":"2026-10-24T12:47:58+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"}