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

April 1, 2026 (updated April 6, 2026)

Server-side request forgery with partial restrictions. An authenticated user can force the server to fetch from internal hosts on default ports (80/443) using hostnames or IPv6 addresses that bypass the IP check. The full response body is returned. Lower severity than a fully unrestricted SSRF due to the port limitation.

References

github.com/SillyTavern/SillyTavern
github.com/SillyTavern/SillyTavern/releases/tag/1.17.0
github.com/SillyTavern/SillyTavern/security/advisories/GHSA-wm7j-m6jm-8797
github.com/advisories/GHSA-wm7j-m6jm-8797
nvd.nist.gov/vuln/detail/CVE-2026-34526

Code Behaviors & Features

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