CVE-2026-44463Public exploit

Arbitrary code execution via environment-variable allowlist bypass

Published May 28, 2026 · Updated May 28, 2026

OS command injection in Zed before 0.229.0 allows attackers to execute arbitrary code through AI agent terminal tool calls. The regex-based allowlist matches an allowlisted command after an inline environment assignment but fails to account for variables such as PAGER that make the command launch an attacker-selected program. Exploitation requires influence over an AI agent tool call and a configured allowlist whose matched command honors the injected environment variable.

CVSS severity8.6
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Zed before 0.229.0 allows attackers to execute arbitrary code through AI agent terminal tool calls. The regex-based allowlist matches an allowlisted command after an inline environment assignment but fails to account for variables such as PAGER that make the command launch an attacker-selected program. Exploitation requires influence over an AI agent tool call and a configured allowlist whose matched command honors the injected environment variable.

The record

CVE
CVE-2026-44463
Published
May 28, 2026
Updated
May 28, 2026
Vendor
Zed Industries
Product
Zed
Classifications
CWE-184, CWE-78, T1059.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.229.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Zed Industries · Zedversion=< 0.229.0

Published CVSS scores

8.6GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-184Incomplete List of Disallowed Inputs
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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