Appwrite < 2.0.0 Argument Injection via providerRootDirectory Parameter (CVE-2026-89036) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89036

Appwrite < 2.0.0 Argument Injection via providerRootDirectory Parameter

Answer in brief

CVE-2026-89036 records a Unknown severity vulnerability in Appwrite < 2.0.0 Argument Injection via providerRootDirectory Parameter. The current sources do not mark it as known exploited. The current feed maps appwrite/appwrite (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps appwrite/appwrite (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
appwrite/appwritegeneric	>=0 <2.0.0	2.0.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for appwrite/appwrite.
Review the reported fix. Update appwrite/appwrite to 2.0.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.