Vulnerability · Published May 29, 2026 · Assigned by GitHub_M

CVE-2026-44652SillyTavern: SSRF vulnerability in the CORS proxy middleware

Medium 6.9

In plain English

A medium-severity server-side request forgery in SillyTavern from SillyTavern. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)6.9Medium

Exploit odds (30 days)0.4%top 68.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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, corsProxyMiddleware forwards req.params.url directly into fetch(url, ...). It only blocks circular requests to its own host and does not enforce destination allowlist or private/loopback restrictions, enabling SSRF. This vulnerability is fixed in 1.18.0.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	sillytavern	1.18.0	GHSA-ccfq-2454-f5xw

Affected products (as reported)

Vendor	Product	Versions
SillyTavern	SillyTavern	< 1.18.0

Weakness: CWE-918 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

References

https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-ccfq-2454-f5xw x_refsource_CONFIRM