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CVE-2026-54055— Kitty has an Arbitrary File Write via Symlink Race Condition in File Transmission Protocol

CVSS 5.0 · Medium EPSS 0.07% · P0

Affected Version Matrix 1

VendorProductVersion RangeStatus
kovidgoyalkitty< 0.47.2affected
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I. Basic Information for CVE-2026-54055

Vulnerability Information
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Vulnerability Title
Kitty has an Arbitrary File Write via Symlink Race Condition in File Transmission Protocol
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: NVD (National Vulnerability Database)
Vulnerability Title
kovidgoyal kitty 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
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 0.47.2之前版本存在安全漏洞，该漏洞源于文件传输协议中符号链接验证和文件创建之间存在TOCTOU竞争条件，`os.open()`调用未使用`O_NOFOLLOW`，可能导致本地权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
kovidgoyalkitty < 0.47.2 -

II. Public POCs for CVE-2026-54055

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III. Intelligence Information for CVE-2026-54055

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Vendor Advisories for CVE-2026-54055 (1)

Same Patch Batch · kovidgoyal · 2026-06-12 · 5 CVEs total

CVE-2026-428517.8 HIGH@kitty-edit DCS + --color=geninclude vulnerable to Unauthenticated in-process RCE
CVE-2026-540567.6 HIGHKitty has an arbitrary file overwrite via symlink following in `kitten dnd` remote drop st
CVE-2026-42850Kitty has a shell command injection
CVE-2026-54057Kitty vulnerable to command injection via unsanitized OSC 21 query reply

IV. Related Vulnerabilities

Same product: kitty
Same vendor: kovidgoyal
Same weakness: CWE-59

V. Comments for CVE-2026-54055

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