{"id":"CVE-2026-116192","kind":"vulnerability","aliases":["CVE-2026-116192"],"related":[],"title":"rclone: unauthenticated SSRF via --rc-serve redirects requests and leaks headers","description":"rclone from 1.37 before 1.74.2 contains a server-side request forgery vulnerability that allows unauthenticated attackers to redirect http and netstorage backend requests by supplying a double-slash root on an existing named remote via --rc-serve. Attackers can make HEAD/GET requests to attacker-chosen hosts to read responses, capture configured custom headers, or obtain valid NetStorage request signatures.","summary":"rclone versions from 1.37 before 1.74.2 let an unauthenticated attacker supply a double-slash root on an existing named remote through --rc-serve, redirecting HTTP and NetStorage backend requests to hosts the attacker chooses. The attacker can read responses, capture configured custom headers, or obtain valid NetStorage request signatures.","severity":"high","cvss":8.2,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["backup","netstorage","package","rclone","self-hosted"],"not_affected_if":["local-cli-only","no-http-or-netstorage-remotes","rc-serve-disabled"],"how_to_check":"- Run `rclone version` and confirm whether the version is earlier than `1.74.2`\n- Check whether rclone is started with `--rc-serve` or `rcd` and reachable from untrusted networks\n- Check whether the rclone config has `http` or `netstorage` remotes with custom headers","fix":"- Upgrade rclone to `1.74.2` or later\n- Until upgraded, stop running `--rc-serve` on networks that untrusted clients can reach","status":"open","published_at":"2026-10-25T14:16:59+00:00","first_seen_at":"2026-10-25T14:41:23+00:00","triaged_at":"2026-10-25T14:42:22+00:00","updated_at":"2026-10-25T14:42:22+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-25T14:42:22Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade rclone to `1.74.2` or later\n- Until upgraded, stop running `--rc-serve` on networks that untrusted clients can reach","reach":"network","title":"rclone: unauthenticated SSRF via --rc-serve redirects requests and leaks headers","impact":"medium","summary":"rclone versions from 1.37 before 1.74.2 let an unauthenticated attacker supply a double-slash root on an existing named remote through --rc-serve, redirecting HTTP and NetStorage backend requests to hosts the attacker chooses. The attacker can read responses, capture configured custom headers, or obtain valid NetStorage request signatures.","category":"package","nicknames":[],"who_cares":["rclone","self-hosted","backup","netstorage"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker reads internal responses and steals NetStorage signatures and custom headers.","analyst_note":"Confirm the affected version range and fix commit against the NVD entry and the rclone release notes for 1.74.2; the sources give no exploitation status or advisory link beyond NVD.","how_to_check":"- Run `rclone version` and confirm whether the version is earlier than `1.74.2`\n- Check whether rclone is started with `--rc-serve` or `rcd` and reachable from untrusted networks\n- Check whether the rclone config has `http` or `netstorage` remotes with custom headers","needs_analyst":true,"not_affected_if":["rc-serve-disabled","local-cli-only","no-http-or-netstorage-remotes"],"who_is_affected":"Teams that run rclone's remote control server (--rc-serve) with at least one existing named remote that uses the http or netstorage backend. Exposure depends on whether the remote-control endpoint can be reached by untrusted clients, since the attacker needs no account. Hosts that use rclone only as a local CLI without the remote control server are not exposed by this flaw.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"high"},"cost_usd":0.00069,"input_tokens":3360,"output_tokens":707,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-116192':15A,18A '-2026':14A,17A '1.37':29B,79C '1.74.2':31B,81C 'allow':91C 'attack':35B,60B,63B,93C,117C,124C 'attacker-chosen':123C 'backend':55B,99C 'backup':19B 'captur':67B,130C 'choos':61B 'chosen':125C 'configur':68B,131C 'contain':82C 'custom':69B,132C 'cve':13A,16A 'doubl':39B,105C 'double-slash':38B,104C 'exist':44B,110C 'forgeri':88C 'head/get':120C 'header':12A,70B,133C 'host':25B,58B,126C 'http':52B,96C 'leak':11A 'let':32B 'make':119C 'name':45B,111C 'netstorag':20B,54B,74B,98C,137C 'obtain':72B,135C 'packag':21B 'rc':6A,49B,115C 'rc-serv':5A,48B,114C 'rclone':1A,22B,26B,77C 'read':65B,128C 'redirect':8A,51B,95C 'remot':46B,112C 'request':9A,56B,75B,87C,100C,121C,138C 'respons':66B,129C 'root':41B,107C 'self':24B 'self-host':23B 'serv':7A,50B,116C 'server':85C 'server-sid':84C 'side':86C 'signatur':76B,139C 'slash':40B,106C 'ssrf':3A 'suppli':36B,102C 'unauthent':2A,34B,92C 'valid':73B,136C 'version':27B 'via':4A,113C 'vulner':89C","nicknames":[],"mitigations":[],"who_affected":"Teams that run rclone's remote control server (--rc-serve) with at least one existing named remote that uses the http or netstorage backend. Exposure depends on whether the remote-control endpoint can be reached by untrusted clients, since the attacker needs no account. Hosts that use rclone only as a local CLI without the remote control server are not exposed by this flaw.","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: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-2026-116192","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116192","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"}