Bug 2513684 (CVE-2026-72903)

Summary: CVE-2026-72903 tabby: Tabby: Arbitrary file write via SFTP path traversal
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Tabby, a terminal emulator. A remote attacker, operating a malicious SFTP server, could exploit a path traversal vulnerability. This occurs when the server returns a specially crafted filename containing backslashes, which are then misinterpreted by Tabby's Windows-native path processing. This misinterpretation allows the attacker to create or overwrite files outside the user's selected download or temporary edit directories, leading to arbitrary file write.
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Description OSIDB Bzimport 2026-08-10 21:01:37 UTC 
Tabby (formerly Terminus) is a highly configurable terminal emulator. Prior to 1.0.235, a malicious SFTP server can return a backslash traversal filename through entry.name. In tabby-ssh/src/session/sftp.ts, SFTPSession.readdir() and _makeFile() use POSIX path processing that preserves the backslashes as ordinary filename characters. In tabby-ssh/src/components/sftpPanel.component.ts, downloadFolderRecursive() propagates item.name into the local relative path. In tabby-electron/src/services/platform.service.ts, ElectronDirectoryDownload.createFile() passes that path to Windows-native path.join(), and in tabby-electron/src/sftpContextMenu.ts, EditSFTPContextMenu.edit() passes item.name to path.join() for the temporary edit path. Windows interprets the preserved backslashes and parent-directory components as traversal, allowing attacker-controlled content to be created or overwritten outside the selected download directory or temporary edit directory. This issue is fixed in version 1.0.235.