🛡️ CVE-2026-54056 — kitty

🟠 CVSS 7.6 — High ⚠️ Exploit Public CWE-59 NVD
7.6
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. A user must be tricked into taking some action. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality none, integrity high, availability low.

Weakness class

CVE-2026-54056 is classified as CWE-59: Link Following. The software follows symbolic or hard links without verifying their target, so a planted link can redirect an operation to a sensitive file.

Affected software

CVE-2026-54056 is recorded against 2 packages.

  • kitty (from 0.47.0 up to 0.47.2)
  • unknown

Timeline and source

Published on 12 June 2026 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

github.com
github.com

CVE-2026-54056 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 7.6
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:L
CWE CWE-59
Public Exploit ⚠️ Yes
Source NVD
Published 2026-06-12
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
kitty 0.47.0 0.47.2
unknown — —

Similar Threats

Exploit Protection

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CVE-2026-54056 carries CVSS 7.6 High rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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