Bug 2443003 (CVE-2026-28296)

Summary: CVE-2026-28296 gvfs: FTP GVfs backend: Arbitrary FTP command injection via CRLF sequences in file paths
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the FTP GVfs backend. A remote attacker could exploit this input validation vulnerability by supplying specially crafted file paths containing carriage return and line feed (CRLF) sequences. These unsanitized sequences allow the attacker to terminate intended FTP commands and inject arbitrary FTP commands, potentially leading to arbitrary code execution or other severe impacts.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-02-26 13:40:36 UTC 
The FTP GVfs backend fails to sanitize CRLF sequences in user supplied file paths before constructing FTP protocol commands. When g_vfs_ftp_file_new_from_gvfs() creates a file object in daemon/gvfsftpfile.c:77-87, it copies the path without validation. This unsanitized path flows through g_vfs_ftp_file_get_ftp_path() into command format strings like "RETR %s" at daemon/gvfsbackendftp.c:883. In daemon/gvfsftptask.c:661, g_string_append_vprintf() includes the malicious path directly into the command buffer, allowing embedded \r\n sequences to terminate the intended command and inject arbitrary FTP commands.