CVE-2026-89036 (GCVE-0-2026-89036)
Vulnerability from cvelistv5 – Published: 2026-09-17 15:54 – Updated: 2026-10-01 15:21 X_Open Source
VLAI
EPSS
VEX
Title
Appwrite < 2.0.0 Argument Injection via providerRootDirectory Parameter
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 17:01 UTC
CWE
- CWE-88 - Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/appwrite/appwrite/releases#rel… | release-notes |
| https://github.com/appwrite/appwrite/pull/13028 | issue-trackingpatch |
| https://github.com/appwrite/appwrite/commit/a82dc… | patch |
| https://www.vulncheck.com/advisories/appwrite-arg… | third-party-advisory |
Impacted products
Date Public
2026-07-28 00:00
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Sightings
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Nomenclature
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
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