{"answers":{"affected":"4 open source packages ship an affected version, including github.com/rclone/rclone and rclone. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-88017 in the wild and no public exploit code.","fix":"Upgrade github.com/rclone/rclone to 1.75.1 or later.","what":"CVE-2026-88017 is a high-severity authentication bypass vulnerability in rclone, published on 10 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-88017 and fix it if it is affected.\n\nWhat it is: CVE-2026-88017 is a high-severity authentication bypass vulnerability in rclone, published on 10 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-88017 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/rclone/rclone (Go): affected from 1.64.0; fixed in 1.75.1\n- github.com/rclone/rclone (Go): affected from 1.64.0; fixed in 1.75.1\n- github.com/rclone/rclone (Go): affected from 1.64.0; fixed in 1.75.1\n- rclone (Bitnami): affected from 1.64.0; fixed in 1.75.1\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-88017/ (Markdown: https://insights.sbomify.com/CVE-2026-88017/index.md)","id":"CVE-2026-88017","markdown":"https://insights.sbomify.com/CVE-2026-88017/index.md","name":"CVE-2026-88017","record":{"aliases":["BIT-rclone-2026-88017","DEBIAN-CVE-2026-88017","GHSA-c476-6w5q-jw77","GO-2026-6458","MINI-2v46-23vf-4wx9","MINI-46fr-rwqx-w43c","MINI-5292-2qrr-qxg5","MINI-72vm-fqfq-hp3f","MINI-7r66-m253-m67r","MINI-8h3j-gg34-5383","MINI-ff78-23m6-ccwc","MINI-qwpx-vx9p-w22x","ROOT-APP-GOBINARY-CVE-2026-88017"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read","data_modify"],"network_reachable":"yes","non_default_config":true,"product_category":"rclone FTP server","requires_auth":"low_privilege","summary":"An attacker can hijack an active FTP session by logging in with the same username, gaining unauthorized read and write access to another user's backend storage.","user_interaction":"required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"rclone","vendor":"rclone"}],"cvss":{"score":7.3,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-488","name":"Exposure of Data Element to Wrong Session"}],"description":"rclone is a command-line program to sync files and directories to and from different cloud storage providers. From 1.64.0 until 1.75.1, the FTP auth-proxy driver in cmd/serve/ftp/ftp.go stores one obscured password per username in the server-wide userPass map[string]string instead of binding the credential or VFS to the authenticated session. If two accepted credentials use the same username but resolve to different proxy backends, a later CheckPasswd login overwrites userPass[user], and subsequent getVFS operations on the first session are reauthorized with the later password. The first session can then read, create, overwrite, rename, or delete objects using the second credential’s backend authority. Exploitation requires the later same-username login to occur while the first session remains open. This issue is fixed in version 1.75.1.","ecosystems":["Bitnami","Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"rclone: FTP cross-session auth-proxy backend confusion","id":"CVE-2026-88017","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":4,"n_references":3,"next":{"headline":"rclone serve s3: --auth-proxy without --auth-key authenticates nobody - full SigV4 signature bypass","id":"CVE-2026-88018"},"packages":[{"ecosystem":"Bitnami","fixed":["1.75.1"],"introduced":["1.64.0"],"last_affected":[],"package":"rclone","purl":"pkg:bitnami/rclone","source":"BIT-rclone-2026-88017"},{"ecosystem":"Go","fixed":["1.75.1"],"introduced":["1.64.0"],"last_affected":[],"package":"github.com/rclone/rclone","purl":null,"source":"GHSA-c476-6w5q-jw77"},{"ecosystem":"Go","fixed":["1.75.1"],"introduced":["1.64.0"],"last_affected":[],"package":"github.com/rclone/rclone","purl":"pkg:golang/github.com/rclone/rclone","source":"GHSA-c476-6w5q-jw77"},{"ecosystem":"Go","fixed":["1.75.1"],"introduced":["1.64.0"],"last_affected":[],"package":"github.com/rclone/rclone","purl":"pkg:golang/github.com/rclone/rclone","source":"GO-2026-6458"}],"prev":{"headline":"rclone: Directory metadata (chmod/chown/chtimes) applied through a planted symlink in rclone local --links escapes the destination","id":"CVE-2026-88016"},"products":["rclone"],"published":"2026-09-10","related":[{"cvss_score":9.8,"headline":"rclone serve s3: --auth-proxy without --auth-key authenticates nobody - full SigV4 signature bypass","id":"CVE-2026-88018","kev_date_added":null,"published":"2026-09-10"},{"cvss_score":9.8,"headline":"Rclone: Unauthenticated command execution in `rclone rcd --rc-serve` via inline remote instantiation, bypassing CVE-2026-41179 fix","id":"CVE-2026-49980","kev_date_added":null,"published":"2026-06-24"},{"cvss_score":9.2,"headline":"RClone: Unauthenticated operations/fsinfo allows attacker-controlled backend instantiation and local command execution","id":"CVE-2026-41179","kev_date_added":null,"published":"2026-04-23"},{"cvss_score":9.2,"headline":"Rclone: Unauthenticated options/set allows runtime auth bypass, leading to sensitive operations and command execution","id":"CVE-2026-41176","kev_date_added":null,"published":"2026-04-22"},{"cvss_score":8.8,"headline":"rclone `serve restic --private-repos` authorization bypass: `..` in the URL path lets an authenticated user read, overwrite and delete other users' repositories","id":"CVE-2026-59733","kev_date_added":null,"published":"2026-07-14"},{"cvss_score":8.7,"headline":"Rclone before 1.75.2 Path Traversal via serve webdav MKCOL","id":"CVE-2026-116191","kev_date_added":null,"published":"2026-10-25"},{"cvss_score":8.2,"headline":"rclone from 1.37 before 1.74.2 SSRF via --rc-serve scheme-relative remote roots","id":"CVE-2026-116192","kev_date_added":null,"published":"2026-10-25"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-11","vendors":["rclone"]},"summary":"An attacker can hijack an active FTP session by logging in with the same username, gaining unauthorized read and write access to another user's backend storage.","url":"https://insights.sbomify.com/CVE-2026-88017/"}