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.
Published: 2026-02-19
Score: 7.1 High
EPSS: < 1% Very Low
KEV: No
Impact: Server‑Side Request Forgery that can expose internal services
Action: Patch immediately
AI Analysis

Impact

The flaw resides in the asset download endpoint of SillyTavern. Users with authentication can instruct the server to perform arbitrary HTTP requests, and read the full response body. This grants access to internal services, cloud metadata, and private network resources, increasing the risk of data exposure and potential lateral movement. The vulnerability exists in all releases prior to 1.16.0 and was fixed by adding a whitelist domain check.

Affected Systems

SillyTavern SillyTavern versions released before 1.16.0 are affected. Versions 1.16.0 and later contain the whitelist domain check and are considered fixed.

Risk and Exploitability

The CVSS score of 7.1 indicates a high risk, while the EPSS score of less than 1% shows a very low probability of exploitation at present. The vulnerability is not listed in the CISA KEV catalog. Exploitation requires the attacker to be authenticated on the local application; an attacker with local user privileges can craft requests via the asset download endpoint, potentially targeting internal IP ranges.

Generated by OpenCVE AI on April 17, 2026 at 17:53 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade SillyTavern to version 1.16.0 or later.
  • Review and restrict the whitelistImportDomains array in config.yaml to only known safe domains.
  • Limit the exposure of the Web UI to trusted users or internal networks to reduce the attack surface.

Generated by OpenCVE AI on April 17, 2026 at 17:53 UTC.

Tracking

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Advisories

No advisories yet.

History

Fri, 20 Feb 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 20 Feb 2026 20:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:sillytavern:sillytavern:*:*:*:*:*:node.js:*:*
Metrics cvssV3_1

{'score': 8.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N'}

Fri, 20 Feb 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Sillytavern
Sillytavern sillytavern
Vendors & Products Sillytavern
Sillytavern sillytavern

Thu, 19 Feb 2026 21:15:00 +0000

Type Values Removed Values Added
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.
Title SillyTavern has Server-Side Request Forgery (SSRF) via Asset Download Endpoint that Allows Reading Internal Services
Weaknesses CWE-918
References
Metrics cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

Sillytavern Sillytavern
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-02-20T19:56:45.423Z

Reserved: 2026-02-12T17:10:53.415Z

Link: CVE-2026-26286

cve-icon Vulnrichment

Updated: 2026-02-20T19:56:38.932Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-19T21:18:31.670

Modified: 2026-02-20T19:45:52.563

Link: CVE-2026-26286

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-17T18:00:12Z

Weaknesses