What is CVE-2026-44466?

CVE-2026-44466 is a high-severity vulnerability in Zed, classified under OS Command Injection. CVSS score: 8.6/10. Published 2026-05-28.

How severe is CVE-2026-44466?

High severity. CVSS v3 base score is 8.6 out of 10.

RCE in Zed

CVE-2026-44466

Zed is a code editor. Prior to 0.229.0, Zed's terminal tool permission system can be bypassed via bash arithmetic expansion $((...)), allowing execution of arbitrary commands nested inside an allowlisted command like echo. This vulnerabili…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.000 (5.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Zed
Zed-industries Zed — versions < 0.229.0

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

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

Frequently asked questions

What is CVE-2026-44466?: CVE-2026-44466 is a high-severity vulnerability in Zed, classified under OS Command Injection. CVSS score: 8.6/10. Published 2026-05-28.
How severe is CVE-2026-44466?: High severity. CVSS v3 base score is 8.6 out of 10.