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CVE-2026-89036

Appwrite < 2.0.0 Argument Injection via providerRootDirectory Parameter

CVSS 4.0 8.7 HIGHCVSS 3.1 8.8 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-89036

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-89036

Published

appwrite

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "defaultStatus": "unaffected",
                    "vendor": "appwrite",
                    "product": "appwrite",
                    "packageURL": "pkg:github/appwrite/appwrite",
                    "repo": "https://github.com/appwrite/appwrite",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "versionType": "semver",
                            "lessThan": "2.0.0"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON