CVE-2026-44651

MEDIUM

SillyTavern CORS Proxy - Reflected Cross-Site Scripting

Title source: manual
STIX 2.1

Description

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, when fetch(url) throws, the code sends: res.status(500).send('Error occurred while trying to proxy to: ' + url + ' ' + error). The url value is attacker-controlled (req.params.url) and is not HTML-escaped before rendering. This vulnerability is fixed in 1.18.0.

References (1)

Core 1
Core References

Scores

CVSS v4 6.9
EPSS 0.0032
EPSS Percentile 23.8%
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (2)
npm/sillytavern 0 - 1.18.0npm
SillyTavern/SillyTavern < 1.18.0
Published May 29, 2026
Tracked Since May 30, 2026