CVE-2026-88013

rclone is a command-line program to sync files and directories to and from different cloud storage providers. From 1.49.0 until 1.75.1, the HTTP backend attaches headers configured through --http-headers or headers= to requests in backend/http/http.go, while its fshttp.NewClient client follows redirects without a backend-specific http.Client.CheckRedirect policy. A configured remote that redirects to another host can therefore cause custom secrets such as X-Api-Key to be resent to that untrusted destination, and a same-host HTTPS-to-HTTP redirect can expose Authorization or Cookie headers in cleartext. Listing, stat, download, mount, and serve operations can trigger the leak during normal use. This issue is fixed in version 1.75.1.

• CWE-200
• CWE-319
• CWE-522

• https://github.com/rclone/rclone/commit/22859b7e696cea3c563c6ba04c6b7f91f74456b4Patch
• https://github.com/rclone/rclone/commit/79fbc0842f74e02cb84f0e3e7261d169983c8831Patch
• https://github.com/rclone/rclone/commit/925fb4fb21eb25e75cd1b64fdd17ded857784bfcPatch
• https://github.com/rclone/rclone/releases/tag/v1.75.1Release Notes
• https://github.com/rclone/rclone/security/advisories/GHSA-486v-q2wf-fp2rVendor Advisory
• https://github.com/rclone/rclone/security/advisories/GHSA-486v-q2wf-fp2rVendor Advisory

Published

Sep 10, 2026

Last Modified

Sep 23, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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