What is CVE-2026-116189?

CVE-2026-116189 is a high-severity vulnerability in Rclone, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2026-10-25.

How severe is CVE-2026-116189?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Rclone

CVE-2026-116189

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.

Published 2026-10-25.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Rclone

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

github.com/rclone/rclone/security/advisories/GHSA-w33h-3qgq-8mv8 (vendor-advisory)
www.vulncheck.com/advisories/rclone-1.55.0-before-1.75.2-selfupdate-signature-v… (third-party-advisory)

Frequently asked questions

What is CVE-2026-116189?: CVE-2026-116189 is a high-severity vulnerability in Rclone, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2026-10-25.
How severe is CVE-2026-116189?: High severity. CVSS v3 base score is 7.5 out of 10.