CVE-2026-34526
MediumCVSS 5.0Exploitation Probability (EPSS)
Low risk12th percentile - higher than 12% of all known CVEs
Summary
In SillyTavern prior to version 1.17.0, an SSRF vulnerability was found in the search.js function. Hostname validation only covers dotted-quad IPv4, allowing bypass via localhost, IPv6, and DNS names resolving to internal addresses. A port check limits exploitation to default ports, reducing risk.
Risk Assessment
The risk includes the ability to send requests to internal services on default ports, potentially leading to information disclosure.
Recommendation
It is recommended to upgrade to version 1.17.0, which contains the fix.
Original NVD description (English source)
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.