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NVD Vulnerability Details :
CVE-2026-44649
Deferred
More InfoOfficial Page
Source-security-advisories@github.com
View Known Exploited Vulnerability (KEV) details
Published At-29 May, 2026 | 19:16
Updated At-29 May, 2026 | 20:17

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 1.18.0, SillyTavern accepts Remote-User (Authelia) and X-Authentik-Username (Authentik) HTTP headers to automatically log in users when SSO is configured. There is no validation that these headers originate from a trusted reverse proxy. Any network client that can reach the SillyTavern port directly can inject these headers and authenticate as any user, including administrators, without a password. This vulnerability is exploitable only when sso.autheliaAuth: true or sso.authentikAuth: true is set in config.yaml (both default to false). This vulnerability is fixed in 1.18.0.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.19.8CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Type: Secondary
Version: 3.1
Base score: 9.8
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CPE Matches

Weaknesses
CWE IDTypeSource
CWE-290Primarysecurity-advisories@github.com
CWE-306Primarysecurity-advisories@github.com
CWE-346Primarysecurity-advisories@github.com
CWE-807Primarysecurity-advisories@github.com
CWE ID: CWE-290
Type: Primary
Source: security-advisories@github.com
CWE ID: CWE-306
Type: Primary
Source: security-advisories@github.com
CWE ID: CWE-346
Type: Primary
Source: security-advisories@github.com
CWE ID: CWE-807
Type: Primary
Source: security-advisories@github.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-gxx6-h3g6-vwjhsecurity-advisories@github.com
N/A
Hyperlink: https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-gxx6-h3g6-vwjh
Source: security-advisories@github.com
Resource: N/A
Change History
0Changes found

Details not found