CVE-2026-89036

Appwrite before 2.0.0 contains an argument injection vulnerability that allows authenticated users with functions.write or sites.write permissions to execute arbitrary commands by injecting TAB characters into the providerRootDirectory parameter used to construct GNU tar commands. The application uses escapeshellcmd instead of escapeshellarg and fails to quote the parameter, allowing TAB characters to survive sanitization and be interpreted as argument separators, enabling injection of arbitrary GNU tar arguments such as --checkpoint-action=exec to achieve remote code execution as the builds worker process user.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/appwrite/appwrite/commit/a82dc6e386a6ac7b88e853a1e6fdb59e0b79ddca
https://github.com/appwrite/appwrite/pull/13028
https://github.com/appwrite/appwrite/releases#release-2.0.0
https://www.vulncheck.com/advisories/appwrite-argument-injection-via-providerrootdirectory-parameter

Configurations

No configuration.

History

17 Sep 2026, 16:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-17 16:18

Updated : 2026-09-22 20:25

NVD link : CVE-2026-89036

Mitre link : CVE-2026-89036

CVE.ORG link : CVE-2026-89036

JSON object : View

Products Affected

No product.

CWE

CWE-88

Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

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