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CVE-2026-42850

Kovidgoyal Kitty command injection

8.8 HIGHPublic exploitEPSS 0.41%
  1. Published12 Jun 2026

Description

Kitty 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. A special escape code will make kitty return an error, this error is not escaped and will be correctly echoed back to the terminal with CRLF, as such it will be run by the shell in use. To exploit this bug, the victim must use a netcat or a similar program to connect to the attacker, or else listening for someone to connect. Once this condition is set, an attacker could pwn the computer of the victim using a special kitty's escape code that will run a command in the shell in use. Version 04.7.0 fixes the issue.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/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-2026-42850 being actively exploited?

CVE-2026-42850 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.41%.

How severe is CVE-2026-42850?

CVE-2026-42850 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 0.41% probability of exploitation.

Which products are affected by CVE-2026-42850?

Affected products include Kovidgoyal Kitty.

How do I fix CVE-2026-42850?

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-2026-42850 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.