Bug 2560412 (CVE-2026-116189)

Summary: CVE-2026-116189 github.com/rclone/rclone: rclone: Arbitrary code execution via self-update signature verification bypass
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: aazores, cmah, eaguilar, ebaron, gparvin, jbalunas, jmatsuok, jtolenti, pjindal, rhaigner, tsze
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in rclone. A remote attacker with the ability to tamper with the release distribution path can bypass cryptographic signature verification during the self-update process. By prepending an unsigned checksum before the signed checksum block, the attacker can cause the application to install a malicious binary, leading to arbitrary code execution.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2560525    
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Description OSIDB Bzimport 2026-10-25 13:33:04 UTC
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.