CVE-2026-54057

Analyzed Analyzed - Analysis Complete

Kitty Terminal OSC 21 Color-Control Input Injection

Publication date: 2026-06-12

Last updated on: 2026-06-16

Assigner: GitHub, Inc.

Description

Kitty is a cross-platform GPU based terminal. In versions prior to 0.47.3, kitty's OSC 21 (color-control) query reply reflects attacker-controlled bytes, including newlines, into the shell's input without sanitization. Version 0.47.3 fixes the issue.

CVSS Scores

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Meta Information

Published

2026-06-12

Last Modified

2026-06-16

Generated

2026-07-03

AI Q&A

2026-06-13

EPSS Evaluated

2026-07-01

NVD

CVE-2026-54057

Affected Vendors & Products

Vendor	Product	Version / Range
kovidgoyal	kitty	to 0.47.3 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-94	The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
CWE-150	The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as escape, meta, or control character sequences when they are sent to a downstream component.

Attack-Flow Graph

Executive Summary

This vulnerability exists in the Kitty terminal software versions prior to 0.47.3. It involves the OSC 21 (color-control) query reply mechanism, which reflects attacker-controlled bytes, including newline characters, directly into the shell's input without proper sanitization.

Because the input is not sanitized, an attacker can inject malicious input into the shell, potentially leading to unintended command execution or other harmful effects.

The issue was fixed in version 0.47.3 of Kitty.

Impact Analysis

This vulnerability can allow an attacker to inject malicious input into the shell environment of the Kitty terminal, potentially leading to unauthorized command execution or manipulation of the terminal session.

Such an impact could compromise the security and integrity of the system where Kitty is running, especially if the attacker can control the input to the terminal.

Mitigation Strategies

To mitigate this vulnerability, upgrade kitty to version 0.47.3 or later, as this version fixes the issue with OSC 21 query reply reflecting attacker-controlled bytes into the shell's input without sanitization.

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