CVE-2026-54057: Kitty vulnerable to command injection via unsanitized OSC 21 query reply

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-06-12 · updated 2026-10-25
Weakness: CWE-94

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.

Affected products

kovidgoyal kitty: before 0.47.3 — fixed in 0.47.3

How to fix

Upgrade to a fixed version: kovidgoyal kitty 0.47.3. Check the vendor advisory for mitigations.

References

https://github.com/kovidgoyal/kitty/security/advisories/GHSA-5gmr-9gwg-hhq6
https://github.com/kovidgoyal/kitty/security/advisories/GHSA-5gmr-9gwg-hhq6

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