CVE-2026-26286
SSRF Vulnerability in SillyTavern Asset Download Enables Internal Access
Publication date: 2026-02-19
Last updated on: 2026-02-20
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| sillytavern | sillytavern | to 1.16.0 (exc) |
Helpful Resources
Exploitability
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
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.