# CVE-2026-89036: Appwrite < 2.0.0 Argument Injection via providerRootDirectory Parameter

> CVE-2026-89036: Appwrite < 2.0.0 Argument Injection via providerRootDirectory Parameter. CVSS 8.8 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-89036
Last updated: 2026-10-01T15:21:54Z

- Published: 2026-09-17 15:54 UTC · Updated: 2026-10-01 15:21 UTC · Assigner: VulnCheck
- CVSS: 8.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS: 0.70%, 53th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-88

## Description

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.

## Affected vendors and products

- appwrite: appwrite

## Tracked companies

- [Appwrite](https://rewindex.com/company/appwrite.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-89036)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-89036)
- [https://github.com/appwrite/appwrite/commit/a82dc6e386a6ac7b88e853a1e6fdb59e0b79ddca](https://github.com/appwrite/appwrite/commit/a82dc6e386a6ac7b88e853a1e6fdb59e0b79ddca)
- [https://github.com/appwrite/appwrite/pull/13028](https://github.com/appwrite/appwrite/pull/13028)
- [https://github.com/appwrite/appwrite/releases\#release-2.0.0](https://github.com/appwrite/appwrite/releases#release-2.0.0)
- [https://www.vulncheck.com/advisories/appwrite-argument-injection-via-providerrootdirectory-parameter](https://www.vulncheck.com/advisories/appwrite-argument-injection-via-providerrootdirectory-parameter)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-89036 · Markdown: https://rewindex.com/cve/CVE-2026-89036.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-89036 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:12:49.347Z