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OpenAdvisories
Critical · 9.1 CVE-2026-88044 BIT-rclone-2026-88044EUVD-2026-75587GHSA-p569-5gjg-9cmjGO-2026-6460

rclone: RC per-server auth-proxy bypass

Published Sep 10, 2026 · Updated Sep 10, 2026 · Assigned by GitHub_M

Description

rclone is a command-line program to sync files and directories to and from different cloud storage providers. From 1.70.0 until 1.75.1, the serve/start RC interface accepts per-server proxyOpt.AuthProxy settings, and the FTP and S3 constructors in cmd/serve/ftp/ftp.go and cmd/serve/s3/server.go incorrectly check the process-global proxy.Opt.AuthProxy value instead. When the global value is empty, the request-local authentication proxy is ignored: FTP falls back to the fixed filesystem with username anonymous and any password, while S3 with AuthKey serves the fixed RC fs rather than the backend selected by the proxy. The dedicated command-line servers that configure the global option are not affected. This issue is fixed in version 1.75.1.

Affected products

VendorProductAffectedFixed
rclone rclone >= 1.70.0, < 1.75.1 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 13 rclone No fix yet —
Debian 12 rclone No fix yet —
ReleasePackageFixed inAdvisory
Ubuntu 26.10 rclone No fix yet —
Ubuntu 18.04 LTS rclone No fix yet —
Show 4 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 26.04 LTS rclone No fix yet —
Ubuntu Pro 24.04 LTS rclone No fix yet —
Ubuntu Pro 22.04 LTS rclone No fix yet —
Ubuntu Pro 20.04 LTS rclone No fix yet —
ReleasePackageFixed inAdvisory
SLES for SAP 16.0 govulncheck-vulndb 0.0.20260916T180043-160000.1.1 SUSE-SU-2026:23863-1, SUSE-SU-2026:23855-1
SLES 16.0 govulncheck-vulndb 0.0.20260916T180043-160000.1.1 SUSE-SU-2026:23863-1, SUSE-SU-2026:23855-1
ReleasePackageFixed inAdvisory
openSUSE Leap 16.0 govulncheck-vulndb 0.0.20260916T180043-160000.1.1 openSUSE-SU-2026:21897-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 rclone 1.75.1-1.amzn2023 ALAS2023-2026-3129

Wolfi

ReleasePackageFixed inAdvisory
Wolfi rolling telegraf-1.38 1.38.4-r28 —

Affected packages

EcosystemPackageAffectedFixedRecord
Go github.com/rclone/rclone >= 1.70.0, < 1.75.1 1.75.1 GHSA-p569-5gjg-9cmj

Advisories 4

References