CVE-2026-34526: SillyTavern is a locally installed user interface that allows users to interact with text generation…
- Occurred
- Apr 2, 2026
- Published
- Apr 2, 2026
- Source
- NVD CVE
Summary
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.
Tags
- CVE
- CVE-2026-34526
- cvss:MEDIUM
Classification
Rationale: SillyTavern is an LLM interface with a security vulnerability in hostname validation, patched in version 1.17.0.
Classifier: Qwen/Qwen3.5-35B-A3B-FP8