CVE-2026-35050
Published: 06 April 2026
Summary
CVE-2026-35050 is a critical-severity Path Traversal (CWE-22) vulnerability in Oobabooga Textgen. Its CVSS base score is 9.1 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 34.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
This vulnerability is AI-related — categorised as LLM Application Platforms; in the Supply Chain and Deployment risk domain.
The strongest mitigations our analysis identified are NIST 800-53 AC-6 (Least Privilege) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2026-35050 is a path traversal vulnerability (CWE-22) affecting text-generation-webui, an open-source web interface for running Large Language Models, in versions prior to 4.1.1. The issue allows users to save extension settings in Python (.py) format directly into the application root directory, enabling the overwriting of critical Python files such as download-model.py. This flaw has a CVSS v3.1 base score of 9.1 (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H), indicating critical severity due to its potential for high-impact remote exploitation.
An attacker with high privileges (PR:H), such as an authenticated user, can exploit this vulnerability over the network with low complexity and no user interaction required. By overwriting a Python file like download-model.py and then triggering its execution via the "Model" menu during a model download request, the attacker achieves arbitrary code execution with scoped impact, potentially compromising confidentiality, integrity, and availability at a high level.
The vulnerability is fixed in text-generation-webui version 4.1.1. Security practitioners should consult the GitHub security advisory at https://github.com/oobabooga/text-generation-webui/security/advisories/GHSA-jg96-p5p6-q3cv for detailed patch information and mitigation guidance.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-19408
Vulnerability details
text-generation-webui is an open-source web interface for running Large Language Models. Prior to 4.1.1, users can save extention settings in "py" format and in the app root directory. This allows to overwrite python files, for instance the "download-model.py" file could…
more
be overwritten. Then, this python file can be triggered to get executed from "Model" menu when requesting to download a new model. This vulnerability is fixed in 4.1.1.
- CWE(s)
AI Security AnalysisAI
- AI Category
- LLM Application Platforms
- Risk Domain
- Supply Chain and Deployment
- OWASP Top 10 for LLMs 2025
- None mapped
- Classification Reason
- Matched keywords: text-generation-webui
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Path traversal in public-facing web app enables RCE by overwriting and executing Python script (download-model.py) via app trigger.
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Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Validates inputs during extension settings saves to block path traversal attempts that enable overwriting Python files in the application root directory.
Enforces least privilege to prevent high-privilege (PR:H) users from writing to critical directories like the app root, blocking exploitation.
Monitors software integrity of critical files like download-model.py to detect unauthorized overwrites from path traversal exploits.