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CVE-2026-42851— @kitty-edit DCS + --color=geninclude vulnerable to Unauthenticated in-process RCE

Quick assessment

Affected
kovidgoyal kitty
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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之前版本存在安全漏洞，该漏洞源于允许向kitty终端写入字节的程序（如远程SSH对端、通过 查看的下载文件、日志行、 中渲染的邮件正文、TUI中的问题正文等）在运行中的kitty进程内执行攻击者提供的Pyth

CVSS 7.8 · High EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
kovidgoyal kitty < 0.47.0 affected
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I. Basic Information for CVE-2026-42851

Vulnerability Information
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Vulnerability Title
@kitty-edit DCS + --color=geninclude vulnerable to Unauthenticated in-process RCE
Source: CVE Program / CVE List V5
Vulnerability Description
Kitty is a cross-platform GPU based terminal. In versions prior to 0.47.0, a program able to write bytes to a kitty terminal — a remote SSH peer, a downloaded file viewed with `cat`, a log line, an email body rendered in `less`, an issue body in a TUI, etc. — can cause kitty to execute attacker-supplied Python inside the running kitty process, with the user's full privileges. There is no approval prompt, no remote-control permission requirement, no shell-integration interaction, no clipboard touch, and no editor interaction. Version 0.47.0 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
kovidgoyal kitty 授权问题漏洞
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 0.47.0之前版本存在安全漏洞，该漏洞源于允许向kitty终端写入字节的程序（如远程SSH对端、通过`cat`查看的下载文件、日志行、`less`中渲染的邮件正文、TUI中的问题正文等）在运行中的kitty进程内执行攻击者提供的Pyth
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

Vendor Product Affected Versions CPE Subscribe
kovidgoyal kitty < 0.47.0 -

II. Public POCs for CVE-2026-42851

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7712 chars
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III. Intelligence Information for CVE-2026-42851

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Vendor Advisories for CVE-2026-42851 (1)

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

CVE-2026-54056 7.6 HIGH Kitty has an arbitrary file overwrite via symlink following in `kitten dnd` remote drop st
CVE-2026-54055 5.0 MEDIUM Kitty has an Arbitrary File Write via Symlink Race Condition in File Transmission Protocol
CVE-2026-42850 Kitty has a shell command injection
CVE-2026-54057 Kitty vulnerable to command injection via unsanitized OSC 21 query reply

IV. Related Vulnerabilities

Same product: kitty
Same vendor: kovidgoyal
Same weakness: CWE-94

V. Comments for CVE-2026-42851

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