Bug 2511773 (CVE-2026-71312)

Summary:	CVE-2026-71312 github.com/rclone/rclone: rclone: Server-Side Command Execution via Malicious SFTP Filenames
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	gparvin, rhaigner
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in rclone, a command-line program for syncing files. This vulnerability allows a remote attacker to execute arbitrary commands on the server when processing SFTP paths. By crafting a malicious filename that uses specific Unicode single-quote characters, an attacker can bypass security measures and inject PowerShell commands. This can lead to unauthorized command execution under the victim's SSH account during server-side hashing operations.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2511912, 2511913
Bug Blocks:

Description OSIDB Bzimport 2026-08-05 20:51:35 UTC

rclone is a command-line program to sync files and directories to and from different cloud storage providers. Prior to v1.75.0, rclone interpolates remote SFTP paths into PowerShell hash commands in backend/sftp/sftp.go, and quoteOrEscapeShellPath escapes only ASCII apostrophe even though PowerShell treats U+2018, U+2019, U+201A, and U+201B as single-quote delimiters, allowing an attacker-controlled filename to terminate the intended path literal and append PowerShell statements that execute as the victim SSH account when server-side hashing is invoked. This issue is fixed in v1.75.0.