CVE-2026-88017: rclone is a command-line program to sync files and directories to and from different cloud storage providers

Routine

HIGH 7.3UPGRADE

CVE-2026-88017 is a high-severity flaw (CVSS 7.3) affecting rclone. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 CheckP

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 86%)
CISA exploited list	No
Weakness	CWE-488
Published	2026-09-10
Last modified	2026-09-14

Publisher (CNA): GitHub, Inc. · Vendor: rclone

Last updated 2026-09-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-10 16:18 UTCPublished CVE record published
2026-09-14 20:00 UTCUpdated Record last modified

rclone rclone UPGRADE

Affected: >= 1.64.0 and < 1.75.1

Fixed in: 1.75.1

Safe to downgrade to: a release before 1.64.0

1. Check installed version

apt-cache policy rclone || rpm -q rclone || rclone --version

2. UPGRADE to 1.75.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade rclone

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rclone

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.64.0 (Debian / Ubuntu)

apt-cache madison rclone sudo apt install rclone=<VERSION_BEFORE_1.64.0> sudo apt-mark hold rclone

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list rclone sudo dnf downgrade rclone-<VERSION_BEFORE_1.64.0> sudo dnf versionlock add rclone

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-88017?

rclone: upgrade to 1.75.1. Exact commands for each OS are on this page.

Is CVE-2026-88017 being exploited?

CVE-2026-88017 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-88017 affect?

CVE-2026-88017 affects rclone. Severity is high (CVSS 7.3). 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 serve

How urgent is CVE-2026-88017?

Priority 29/100. High severity

Related CVEs

CVE-2026-88015 MEDIUM 5.3 UPGRADE rclone is a command-line program to sync files and directories to and from different cloud storage providers
CVE-2026-88014 MEDIUM 6.3 UPGRADE rclone is a command-line program to sync files and directories to and from different cloud storage providers
CVE-2026-88013 LOW 3.7 UPGRADE rclone is a command-line program to sync files and directories to and from different cloud storage providers
CVE-2026-88016 HIGH 7.1 UPGRADE rclone is a command-line program to sync files and directories to and from different cloud storage providers
CVE-2026-88018 CRITICAL 9.8 UPGRADE rclone is a command-line program to sync files and directories to and from different cloud storage providers

References

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