Vulnerability · Published Apr 2, 2026 · Assigned by GitHub_M
CVE-2026-34526SillyTavern: Incomplete IP validation in /api/search/visit allows SSRF via localhost and IPv6
Medium 5.0
In plain English
A medium-severity server-side request forgery in SillyTavern from SillyTavern. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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. Prior to version 1.17.0, in src/endpoints/search.js, the hostname is checked against /^\d+\.\d+\.\d+\.\d+$/. This only matches literal dotted-quad IPv4 (e.g. 127.0.0.1, 10.0.0.1). It does not catch: localhost (hostname, not dotted-quad), [::1] (IPv6 loopback), and DNS names resolving to internal addresses (e.g. localtest.me -> 127.0.0.1). A separate port check (urlObj.port !== '') limits exploitation to services on default ports (80/443), making this lower severity than a fully unrestricted SSRF. This issue has been patched in version 1.17.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | sillytavern | 1.17.0 | GHSA-wm7j-m6jm-8797 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SillyTavern | SillyTavern | < 1.17.0 |
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
References
- https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-wm7j-m6jm-8797 x_refsource_CONFIRM
- https://github.com/SillyTavern/SillyTavern/releases/tag/1.17.0 x_refsource_MISC