{"id":"CVE-2026-116194","kind":"vulnerability","aliases":["CVE-2026-116194"],"related":[],"title":"Rclone: pCloud OAuth callback CSRF lets web pages plant attacker tokens","description":"Rclone from 1.52.0 before 1.75.2 contains a cross-site request forgery vulnerability in the pCloud backend's localhost OAuth callback, which disables the state check and trusts the hostname parameter. Malicious web pages can send a stateless request to port 53682 during authorization, planting attacker tokens and API hosts so later transfers reach the attacker.","summary":"Rclone's pCloud backend accepts a localhost OAuth callback without checking the state value and trusts a hostname parameter. A malicious web page can send a request to port 53682 during authorization, planting attacker tokens and API hosts so later transfers go to the attacker.","severity":"high","cvss":7.6,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["package","pcloud","rclone","self-hosted","workstations"],"not_affected_if":["no-pcloud-remote","version-1.75.2-or-later"],"how_to_check":"- Run `rclone version` and compare against the fixed release\n- Check whether any remote uses the pCloud backend (`rclone listremotes`, then look for pCloud entries in `rclone.conf`)","fix":"- Upgrade rclone to `1.75.2` or later\n- Re-authorize pCloud remotes after upgrading and revoke any tokens created during an authorization session you did not start","status":"open","published_at":"2026-10-25T14:16:59+00:00","first_seen_at":"2026-10-25T14:41:23+00:00","triaged_at":"2026-10-25T14:42:31+00:00","updated_at":"2026-10-25T14:42:31+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-25T14:42:31Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade rclone to `1.75.2` or later\n- Re-authorize pCloud remotes after upgrading and revoke any tokens created during an authorization session you did not start","reach":"local","title":"Rclone: pCloud OAuth callback CSRF lets web pages plant attacker tokens","impact":"high","summary":"Rclone's pCloud backend accepts a localhost OAuth callback without checking the state value and trusts a hostname parameter. A malicious web page can send a request to port 53682 during authorization, planting attacker tokens and API hosts so later transfers go to the attacker.","category":"package","nicknames":[],"who_cares":["rclone","pcloud","workstations","self-hosted"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker-controlled tokens and API hosts redirect later pCloud transfers to the attacker","analyst_note":"Confirm the exact affected version range and whether the callback listens on all interfaces, using the NVD entry and the upstream rclone advisory.","how_to_check":"- Run `rclone version` and compare against the fixed release\n- Check whether any remote uses the pCloud backend (`rclone listremotes`, then look for pCloud entries in `rclone.conf`)","needs_analyst":true,"not_affected_if":["no-pcloud-remote","version-1.75.2-or-later"],"who_is_affected":"Teams that run rclone on a workstation or server with a pCloud remote configured and an authorization flow in progress while browsing the web. Machines with no pCloud remote, or running 1.75.2 or later, are not exposed.","user_interaction":"yes","needs_special_setup":"yes","severity_if_unknown":"high"},"cost_usd":0.00063,"input_tokens":3348,"output_tokens":591,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-116194':14A,17A '-2026':13A,16A '1.52.0':72C '1.75.2':74C '53682':54B,111C 'accept':29B 'api':61B,118C 'attack':10A,58B,69B,115C,125C 'author':56B,113C 'backend':28B,86C 'callback':4A,33B,90C 'check':35B,95C 'contain':75C 'cross':78C 'cross-sit':77C 'csrf':5A 'cve':12A,15A 'disabl':92C 'forgeri':81C 'go':66B 'host':23B,62B,119C 'hostnam':42B,99C 'later':64B,121C 'let':6A 'localhost':31B,88C 'malici':45B,101C 'oauth':3A,32B,89C 'packag':18B 'page':8A,47B,103C 'paramet':43B,100C 'pcloud':2A,19B,27B,85C 'plant':9A,57B,114C 'port':53B,110C 'rclone':1A,20B,25B,70C 'reach':123C 'request':51B,80C,108C 'self':22B 'self-host':21B 'send':49B,105C 'site':79C 'state':37B,94C 'stateless':107C 'token':11A,59B,116C 'transfer':65B,122C 'trust':40B,97C 'valu':38B 'vulner':82C 'web':7A,46B,102C 'without':34B 'workstat':24B","nicknames":[],"mitigations":[],"who_affected":"Teams that run rclone on a workstation or server with a pCloud remote configured and an authorization flow in progress while browsing the web. Machines with no pCloud remote, or running 1.75.2 or later, are not exposed.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-25T14:16:59+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/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-2026-116194","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116194","severity":null,"published_at":"2026-10-25T14:16:59+00:00","modified_at":"2026-10-25T14:16:59+00:00","first_seen_at":"2026-10-25T14:41:23+00:00","fetched_at":"2026-10-25T14:41:23+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"}