Bug 2488555 (CVE-2026-54056) - CVE-2026-54056 kitty: Kitty: Arbitrary file overwrite via malicious drag-and-drop
Summary: CVE-2026-54056 kitty: Kitty: Arbitrary file overwrite via malicious drag-and-...
Keywords:
Status: NEW
Alias: CVE-2026-54056
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2488608 2488610
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-12 21:02 UTC by OSIDB Bzimport
Modified: 2026-06-12 22:20 UTC (History)
0 users

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Description OSIDB Bzimport 2026-06-12 21:02:18 UTC
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.


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