CVE-2026-44466: Zed: Allowlist Bypass via Bash Arithmetic Expansion in Terminal Tool Permissions

Severity: high (CVSS 8.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-05-28 · updated 2026-06-17
Weakness: CWE-78

Description

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 vulnerability is fixed in 0.229.0.

Affected products

zed-industries zed: before 0.229.0 — fixed in 0.229.0

How to fix

Upgrade to a fixed version: zed-industries zed 0.229.0. Check the vendor advisory for mitigations.

References

https://github.com/zed-industries/zed/security/advisories/GHSA-c99f-97vf-4h5h
https://github.com/zed-industries/zed/security/advisories/GHSA-c99f-97vf-4h5h

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