CVE-2026-44649

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-44649
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44649.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-44649
Aliases
Published
2026-05-29T17:45:26.073Z
Modified
2026-08-12T03:51:08.974314985Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
SillyTavern: Authentication Bypass via SSO Header Injection
Details

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.

Database specific 
{
    "cwe_ids": [
        "CWE-290",
        "CWE-306",
        "CWE-346",
        "CWE-807"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44649.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/sillytavern/sillytavern

Affected ranges

Type
GIT
Repo
https://github.com/sillytavern/sillytavern
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
51ad27fb86d39a3daca3adaa970375c9670c12df
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.18.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

1.*
1.10.0
1.10.1
1.10.10
1.10.2
1.10.3
1.10.4
1.10.5
1.10.6
1.10.7
1.10.8
1.10.9
1.11.0
1.11.1
1.11.2
1.11.3
1.11.4
1.11.4-1
1.11.5
1.11.6
1.11.7
1.11.8
1.12.0
1.12.0-6
1.12.1
1.12.10
1.12.11
1.12.12
1.12.13
1.12.14
1.12.2
1.12.3
1.12.4
1.12.5
1.12.6
1.12.7
1.12.8
1.12.9
1.13.0
1.13.1
1.13.2
1.13.3
1.13.4
1.13.5
1.14.0
1.15.0
1.16.0
1.17.0
1.9.2
1.9.5
1.9.6
1.9.7

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44649.json"