Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Sillytavern | Sillytavern | < 1.17.0 |
Related Weaknesses (CWE)
References
- https://github.com/SillyTavern/SillyTavern/releases/tag/1.17.0Release Notes
- https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-wm7j-m6jm-87Vendor AdvisoryExploit
- https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-wm7j-m6jm-87Vendor AdvisoryExploit
FAQ
What is CVE-2026-34526?
CVE-2026-34526 is a vulnerability with a CVSS score of 5.0 (MEDIUM). 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 ...
How severe is CVE-2026-34526?
CVE-2026-34526 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-34526?
Check the references section above for vendor advisories and patch information. Affected products include: Sillytavern Sillytavern.