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Vulnerability record · CVE-2026-42851 · published 12 June 2026

CVE-2026-42851: Kovidgoyal kitty code injection vulnerability

Kovidgoyal · Kitty

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.

7.8 CVSS 3.1 High EPSS 0.19% · top 91.8% CWE-94 · Code injectionCWE-862 · Missing authorization
7.8CVSS 3.1 base score
0.19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References, 1 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/kovidgoyal/kitty/security/advisories/GHSA-w98g-hpvr-r332 ExploitMitigationVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-33642Kovidgoyal kitty out-of-bounds read vulnerabilityKitty is a cross-platform GPU based terminal. In versions 0.46.2 and below, the handle_compose_command() function in kitty/graphics.c performs bounds…EPSS 0.43%9.8CVE-2020-35605Kovidgoyal kitty vulnerabilityThe Graphics Protocol feature in graphics.c in kitty before 0.19.3 allows remote attackers to execute arbitrary code because a filename containing sp…EPSS 3.8%8.8CVE-2026-33633Kovidgoyal kitty heap-based buffer overflow vulnerabilityKitty is a cross-platform GPU based terminal. Versions 0.46.2 and below contain a heap buffer overflow in load_image_data() that allows any process w…EPSS 0.46%7.8CVE-2025-43929Kovidgoyal kitty origin validation error vulnerabilityopen_actions.py in kitty before 0.41.0 does not ask for user confirmation before running a local executable file that may have been linked from an un…EPSS 0.19%7.4CVE-2026-42850Kovidgoyal kitty command injection vulnerabilityKitty is a cross-platform GPU based terminal. In versions prior to 0.47.0, it is possible to inject commands within the subshell through kitty error.…EPSS 0.41%7.3CVE-2026-54057Kovidgoyal kitty code injection vulnerabilityKitty 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 by…EPSS 0.20%7.1CVE-2026-54056Kovidgoyal kitty link following vulnerabilityKitty is a cross-platform GPU based terminal. In versions 0.47.0 and 0.47.1, `kitten dnd` can allow a malicious remote drag-and-drop source to overwr…EPSS 0.38%5.0CVE-2026-54055Kovidgoyal kitty link following vulnerabilityKitty is a cross-platform GPU based terminal. In versions prior to 0.47.2, a local privilege escalation vulnerability exists in kitty's file transmis…EPSS 0.10%

Source: NIST National Vulnerability Database (record CVE-2026-42851), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.