CVE-2026-54056— Kovidgoyal kitty 后置链接漏洞

Kitty has an arbitrary file overwrite via symlink following in `kitten dnd` remote drop staging

Kitty is a cross-platform GPU based terminal. In versions 0.47.0 and 0.47.1, `kitten dnd` can allow a malicious remote drag-and-drop source to overwrite or truncate arbitrary files writable by the local kitty user. Remote `text/uri-list` drops are staged in a temporary directory, but on case-sensitive filesystems duplicate remote basenames are not de-duplicated. An attacker can first create a staged symlink and then send a same-name regular-file entry. The regular-file write uses `utils.CreateAt()` / `openat(O_RDWR|O_CREAT|O_TRUNC)` without `O_NOFOLLOW`, so it follows the attacker-created symlink and writes outside the staging directory before final overwrite confirmation runs. This appears related in class to the file-transfer symlink advisory, but it is a different bug: it affects `kitten dnd` remote drag-and-drop staging, uses different vulnerable code (`kittens/dnd/drop.go` and `tools/utils/file_at_fd.go`), and reproduces on commit `4aa4a5c0567a92553a8c20a88a4352da637fca5d`, after the file-transfer `O_NOFOLLOW` fix. Version 0.47.2 patches the issue.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:L

在文件访问前对链接解析不恰当(链接跟随)

Kovidgoyal kitty 后置链接漏洞

Kovidgoyal kitty是Kovidgoyal个人开发者开源的一个基于Python的GPU终端仿真软件。 该软件可提供基本的终端功能,并且基于GPU渲染可降低系统负载,采用OpenGL进行渲染,可支持在Linux、Mac上使用。 kovidgoyal kitty 0.47.0版本至0.47.2之前版本存在后置链接漏洞，该漏洞源于`kitten dnd`远程拖放暂存过程中未对符号链接进行去重，且文件写入操作未使用`O_NOFOLLOW`标志，可能允许恶意远程拖放源利用符号链接写入暂存目录之外，进而覆

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