CVE-2026-89036: Appwrite < 2.0.0 Argument Injection via providerRootDirectory Parameter
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.
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H · CWE-88
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
appwrite: appwrite
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- github.com/appwrite/appwrite/commit/a82dc6e386a6ac7b88e853a1e6fdb59e0b79ddca (opens in new tab)
- github.com/appwrite/appwrite/pull/13028 (opens in new tab)
- github.com/appwrite/appwrite/releases (opens in new tab)
- www.vulncheck.com/advisories/appwrite-argument-injection-via-providerrootdirectory-para… (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)