CVE-2026-26286 SillyTavern has Server-Side Request Forgery (SSRF) via Asset Download Endpoint that Allows Reading Internal Services

High 7.1 Published 19 Feb 2026 Updated 20 Feb 2026

Authenticated attackers can exploit an SSRF vulnerability in SillyTavern to read internal services and cloud metadata via the asset download endpoint.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-26286?

CVE-2026-26286 is a high-severity server-side request forgery vulnerability in SillyTavern, published on 19 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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. In versions prior to 1.16.0, a Server-Side Request Forgery (SSRF) vulnerability in the asset download endpoint allows authenticated users to make arbitrary HTTP requests from the server and read the full response body, enabling access to internal services, cloud metadata, and private network resources. The vulnerability has been patched in the version 1.16.0 by introducing a whitelist domain check for asset download requests. It can be reviewed and customized by editing the `whitelistImportDomains` array in the `config.yaml` file.

Weakness: CWE-918

Which versions are affected by CVE-2026-26286?

It affects 1 product.

Products include Sillytavern Sillytavern.

How do I fix CVE-2026-26286?

No fix has been published for CVE-2026-26286 yet. Limit exposure of the affected software until one is available.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2026-26286 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-26286 exists.

Sources

Also known as GHSA-cccp-94vg-j92r.