CVE-2026-42850: Kitty is a cross-platform GPU based terminal

Q: How do I fix CVE-2026-42850?

kitty: upgrade to 0.47.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-42850 being exploited?

CVE-2026-42850 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-42850 affect?

CVE-2026-42850 affects kitty. Severity is high (CVSS 8.8). 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

Q: How urgent is CVE-2026-42850?

Priority 41/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2026-42850 is a high-severity flaw (CVSS 8.8) affecting kitty. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 listeni

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-77
Published	2026-06-12
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: kovidgoyal

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-12 20:16 UTCPublished CVE record published
2026-10-26 11:10 UTCUpdated Record last modified

kovidgoyal kitty UPGRADE

Affected: < 0.47.0

Fixed in: 0.47.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy kitty || rpm -q kitty || kitty --version

2. UPGRADE to 0.47.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade kitty

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade kitty

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-42850?

kitty: upgrade to 0.47.0. Exact commands for each OS are on this page.

Is CVE-2026-42850 being exploited?

CVE-2026-42850 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-42850 affect?

CVE-2026-42850 affects kitty. Severity is high (CVSS 8.8). 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

How urgent is CVE-2026-42850?

Priority 41/100. High severity; Public exploit reference

Related CVEs

CVE-2026-42851 HIGH 7.8 UPGRADE Kitty is a cross-platform GPU based terminal
CVE-2026-54055 MEDIUM 5.0 UPGRADE Kitty is a cross-platform GPU based terminal
CVE-2026-54056 HIGH 7.6 UPGRADE Kitty is a cross-platform GPU based terminal
CVE-2026-54057 HIGH 7.8 UPGRADE Kitty is a cross-platform GPU based terminal

References

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