CVE-2026-44650: Sillytavern

Critical severity, CVSS 9.1. EPSS: 0.8% chance of exploitation in the next 30 days.

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.

Affected products

• Sillytavern Sillytavern: before 1.18.0 (fixed in 1.18.0)

Published 2026-05-29. Last modified 2026-07-22.