Vulnerability · Published Oct 25, 2026 · Assigned by VulnCheck

CVE-2026-116189rclone 1.55.0 before 1.75.2 selfupdate Signature Verification Bypass via SHA256SUMS

High 7.5

In plain English

A high-severity security flaw in rclone from rclone. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.1%top 96.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Alpine:v3.24	rclone	1.75.2-r0	ALPINE-CVE-2026-116189
Debian:12	rclone	no fix listed	DEBIAN-CVE-2026-116189
Debian:13	rclone	no fix listed	DEBIAN-CVE-2026-116189
Ubuntu:26.10	rclone	no fix listed	UBUNTU-CVE-2026-116189

Affected products (as reported)

Vendor	Product	Versions
rclone	rclone	1.55.0 – before 1.75.2

Weakness: CWE-347 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-w33h-3qgq-8mv8) vendor-advisory
VulnCheck Advisory: rclone 1.55.0 before 1.75.2 selfupdate Signature Verification Bypass via SHA256SUMS third-party-advisory