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CVE-2026-42851

Kovidgoyal Kitty code injection

7.8 HIGHPublic exploitEPSS 0.19%
  1. Published12 Jun 2026

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 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Kovidgoyal Kitty< 0.47.0

Remediation

Fixed in
Kovidgoyal Kitty≥ 0.47.0

References

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Frequently asked

Is CVE-2026-42851 being actively exploited?

CVE-2026-42851 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.19%.

How severe is CVE-2026-42851?

CVE-2026-42851 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 0.19% probability of exploitation.

Which products are affected by CVE-2026-42851?

Affected products include Kovidgoyal Kitty.

How do I fix CVE-2026-42851?

Upgrade affected software to a fixed version, for example Kovidgoyal Kitty 0.47.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-42851 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.