Bug 2531530 (CVE-2026-88013)

Summary: CVE-2026-88013 github.com/rclone/rclone: rclone: Information disclosure via HTTP backend forwarding headers on redirect
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: aazores, cmah, eaguilar, ebaron, gparvin, jmatsuok, jtolenti, pjindal, rhaigner
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in rclone. The HTTP backend in rclone can forward custom or authentication headers, such as API keys, Authorization, or Cookie headers, when following redirects to a different host. This can lead to the disclosure of sensitive information to untrusted destinations. Additionally, a redirect from HTTPS to HTTP on the same host can expose these headers in cleartext.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2531801, 2531804    
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Description OSIDB Bzimport 2026-09-10 15:52:18 UTC 
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.