Sillytavern · Sillytavern · CVE-2026-44652
**Name of the Vulnerable Software and Affected Versions**
SillyTavern versions prior to 1.18.0
**Description**
SillyTavern is a locally installed user interface for interacting with large language models, image generation engines, and text-to-speech voice models. The `corsProxyMiddleware` function forwards the `url` variable from `req.params.url` directly into a `fetch()` operation. This process only blocks circular requests to its own host and fails to enforce destination allowlists or private/loopback restrictions, leading to Server-Side Request Forgery (SSRF), a flaw where a server is tricked into making unauthorized requests to internal or external resources. This issue occurs at the '/proxy/:url(*)' endpoint. An attacker can use this to pivot network access, reach unintended internal resources, access internal network services or metadata endpoints, and exfiltrate sensitive responses.
**Recommendations**
Update to version 1.18.0.
Enable and properly configure the Private Request Whitelisting filter, especially when the instance is hosted over a network.