What is CVE-2026-42851?

CVE-2026-42851 is a high-severity vulnerability in Kovidgoyal Kitty, classified under Code Injection. CVSS score: 7.8/10. Published 2026-06-12.

How severe is CVE-2026-42851?

High severity. CVSS v3 base score is 7.8 out of 10.

RCE in Kovidgoyal Kitty

CVE-2026-42851

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 b…

Vulnerability class: RCE (Remote Code Execution)

EPSS: 0.002 (6.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Kovidgoyal Kitty — versions < 0.47.0

Weakness classification (CWE)

CWE-94 — Code Injection
CWE-862 — Missing Authorization

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-42851?: CVE-2026-42851 is a high-severity vulnerability in Kovidgoyal Kitty, classified under Code Injection. CVSS score: 7.8/10. Published 2026-06-12.
How severe is CVE-2026-42851?: High severity. CVSS v3 base score is 7.8 out of 10.