PT-2026-29663 · Sillytavern+1 · Sillytavern

Bulmax9797-Sketch · Published 2026-04-01 · Updated 2026-04-02 · CVE-2026-34526

Mitre

CVSS v3.1

5.0

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

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.

Exploit

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2026-34526

GHSA-WM7J-M6JM-8797

Affected Products

Sillytavern

References · 5

• 🔥 https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-wm7j-m6jm-8797 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-34526 · Security Note
• https://osv.dev/vulnerability/GHSA-wm7j-m6jm-8797 · Vendor Advisory
• https://github.com/SillyTavern/SillyTavern · Note
• https://github.com/SillyTavern/SillyTavern/releases/tag/1.17.0 · Note