CVE-2026-116189: rclone from 1.55.0 before 1.75.2 contains a signature verification bypass in stable selfupdate that trusts che

Routine

HIGH 7.5UPGRADE

CVE-2026-116189 is a high-severity flaw (CVSS 7.5) affecting rclone. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

rclone from 1.55.0 before 1.75.2 contains a signature verification bypass in stable selfupdate that trusts checksums from unsigned bytes preceding the PGP-clearsigned SHA256SUMS block. Attackers controlling the release distribution path can prepend an unsigned checksum line matching a malicious archive, causing selfupdate to install an attacker-controlled rclone executable.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-347
Published	2026-10-25
Last modified	2026-10-28

Publisher (CNA): VulnCheck · Vendor: rclone

Last updated 2026-10-28 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-25 14:16 UTCPublished CVE record published
2026-10-28 15:38 UTCUpdated Record last modified

rclone rclone UPGRADE

Affected: >= 1.55.0 and < 1.75.2

Fixed in: 1.75.2

Safe to downgrade to: a release before 1.55.0

1. Check installed version

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

2. UPGRADE to 1.75.2 (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 1.55.0 (Debian / Ubuntu)

apt-cache madison rclone sudo apt install rclone=<VERSION_BEFORE_1.55.0> 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_1.55.0> 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-2026-116189?

rclone: upgrade to 1.75.2. Exact commands for each OS are on this page.

Is CVE-2026-116189 being exploited?

CVE-2026-116189 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-2026-116189 affect?

CVE-2026-116189 affects rclone. Severity is high (CVSS 7.5). rclone from 1.55.0 before 1.75.2 contains a signature verification bypass in stable selfupdate that trusts checksums from unsigned bytes preceding the PGP-clearsigned SHA256SUMS block. Attackers controlling the release distribution path can

How urgent is CVE-2026-116189?

Priority 27/100. High severity

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References

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