What is CVE-2026-44649?

CVE-2026-44649 is a critical-severity vulnerability in Sillytavern, classified under Authentication Bypass by Spoofing. CVSS score: 9.8/10. Published 2026-05-29.

How severe is CVE-2026-44649?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Sillytavern

CVE-2026-44649

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 (Authel…

EPSS: 0.001 (25.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Sillytavern — versions < 1.18.0

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing
CWE-306 — Missing Authentication for Critical Function
CWE-346 — Origin Validation Error
CWE-807

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-44649?: CVE-2026-44649 is a critical-severity vulnerability in Sillytavern, classified under Authentication Bypass by Spoofing. CVSS score: 9.8/10. Published 2026-05-29.
How severe is CVE-2026-44649?: Critical severity. CVSS v3 base score is 9.8 out of 10.