CVE-2026-116189

rclone 1.55.0 before 1.75.2 selfupdate Signature Verification Bypass via SHA256SUMS

State: Published
Severity: 7.7 High
Published: Oct 25, 2026
Updated: Oct 29, 2026
Reserved: Oct 25, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	7.7 High	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	VulnCheck
3.1	7.5 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H	VulnCheck

Weaknesses

CWE-347 Improper Verification of Cryptographic Signature

Affected Products

Product	Versions
rclonerclone	1.55.0 to before 1.75.2Affected 1.75.2Not affected

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 SHA256SUMSthird-party-advisory

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