# CVE-2026-54055: kitty: Kitty is a cross-platform GPU based terminal

CVE-2026-54055 is fixed in 3 products on 1 platform, first by kitty 0.32.2-1ubuntu0.4+esm2, released June 12, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-54055
- Priority: Routine
- CVSS: 5.0 (medium)
- EPSS: 0.0007
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 12, 2026

## Description

Kitty is a cross-platform GPU based terminal. In versions prior to 0.47.2, a local privilege escalation vulnerability exists in kitty's file transmission protocol where a child process running in the terminal can write to arbitrary files on the filesystem by exploiting a TOCTOU (Time-of-Check-Time-of-Use) race condition between symlink validation and file creation. The `os.open()` call used to create files does not use `O_NOFOLLOW`, allowing an attacker to create a symlink between the initial stat check and the actual file open, causing the write to follow the symlink to an arbitrary destination. Version 0.47.2 fixes the issue.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | kitty Debian 13.5 (trixie) | 0.41.1-2+deb13u2 | [DEBIAN-CVE-2026-54055](https://patchblox.com/security/data/fix/linux/debian-cve-2026-54055.md) | Jun 24, 2026 |
| Linux | kitty Debian 14 | 0.47.3-1 | [DEBIAN-CVE-2026-54055](https://patchblox.com/security/data/fix/linux/debian-cve-2026-54055.md) | Jun 24, 2026 |
| Linux | kitty Ubuntu 24.04.5 LTS (noble) | 0.32.2-1ubuntu0.4+esm2 | [kitty 0.32.2-1ubuntu0.4+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-kitty-0.32.2-1ubuntu0.4-esm2.md) | Jun 12, 2026 |
| Linux | kitty Ubuntu 26.04.1 LTS (resolute) | 0.45.0-1ubuntu0.1~esm2 | [kitty 0.45.0-1ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-kitty-0.45.0-1ubuntu0.1-esm2.md) | Jun 12, 2026 |
| Linux | kitty-shell-integration Ubuntu 24.04.5 LTS (noble) | 0.32.2-1ubuntu0.4+esm2 | [kitty-shell-integration 0.32.2-1ubuntu0.4+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-kitty-shell-integration-0.32.2-1ubuntu0.4-esm2.md) | Jun 12, 2026 |
| Linux | kitty-shell-integration Ubuntu 26.04.1 LTS (resolute) | 0.45.0-1ubuntu0.1~esm2 | [kitty-shell-integration 0.45.0-1ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-kitty-shell-integration-0.45.0-1ubuntu0.1-esm2.md) | Jun 12, 2026 |
| Linux | kitty-terminfo Ubuntu 24.04.5 LTS (noble) | 0.32.2-1ubuntu0.4+esm2 | [kitty-terminfo 0.32.2-1ubuntu0.4+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-kitty-terminfo-0.32.2-1ubuntu0.4-esm2.md) | Jun 12, 2026 |
| Linux | kitty-terminfo Ubuntu 26.04.1 LTS (resolute) | 0.45.0-1ubuntu0.1~esm2 | [kitty-terminfo 0.45.0-1ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-kitty-terminfo-0.45.0-1ubuntu0.1-esm2.md) | Jun 12, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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