CVE-2026-44650
Critical
Description
SillyTavern is a locally installed user interface that allows users to interact with text generation large language models, image generation engines, and text-to-speech voice models. Prior to 1.18.0, POST /api/extensions/delete endpoint accepts extensionName: "." which bypasses sanitize-filename validation, causing the entire user extensions directory to be recursively deleted. No authentication is required in the default configuration. This vulnerability is fixed in 1.18.0.
SeverityCritical
CVSS9.1
Exploit probability—
ProductSillytavern
PublishedMay 29, 2026
First seenMay 29, 2026
Weakness typeCWE-22Path traversal
How to fix
Update
- sillytavern1.18.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| sillytavernnpm | v < 1.18.0 | 1.18.0 |
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