SillyTavern has Authentication Bypass via SSO Header Injection — CVE-2026-44649

Summary

## Resolution SillyTavern 1.18.0 now includes a configuration option to limit which IP addresses can authorize using SSO headers, limiting to just loopback addresses by default. A setting can be customized according to user's needs. Documentation: https://docs.sillytavern.app/administration/sso/ ## Summary SillyTavern accepts `Remote-User` (Authelia) and `X-Authentik-Username` (Authentik) HTTP headers to…

Product

npm: sillytavern

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

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