CVE-2026-26286
Received Received - Intake
SSRF Vulnerability in SillyTavern Asset Download Enables Internal Access

Publication date: 2026-02-19

Last updated on: 2026-02-20

Assigner: GitHub, Inc.

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.
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Meta Information
Published
2026-02-19
Last Modified
2026-02-20
Generated
2026-06-16
AI Q&A
2026-02-19
EPSS Evaluated
2026-06-15
NVD
CVE-2026-26286
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
sillytavern sillytavern to 1.16.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
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Executive Summary

The vulnerability in SillyTavern versions prior to 1.16.0 is a Server-Side Request Forgery (SSRF) issue in the asset download endpoint.

This flaw allows authenticated users to make arbitrary HTTP requests from the server and read the full response body.

As a result, attackers can access internal services, cloud metadata, and private network resources that should not be exposed.

The vulnerability was fixed in version 1.16.0 by adding a whitelist domain check for asset download requests, which can be customized in the configuration file.

Impact Analysis

This vulnerability can allow an attacker with authenticated access to the SillyTavern server to make unauthorized HTTP requests from the server itself.

Such access can lead to exposure of sensitive internal services, cloud metadata, and private network resources.

This could result in information disclosure, unauthorized access to internal systems, and potential further exploitation within the network.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability, upgrade SillyTavern to version 1.16.0 or later, where the SSRF vulnerability has been patched.

Additionally, review and customize the whitelist domain check for asset download requests by editing the `whitelistImportDomains` array in the `config.yaml` file to restrict allowed domains.

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