Is CVE-2026-44651 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-44651 being exploited in the wild.

How severe is CVE-2026-44651?

Medium severity, with a CVSS score of 4, published 29 May 2026.

Which products and versions are affected?

sillytavern (npm) <= 1.17.0, SEMVER:introduced=0,fixed=1.18.0.

Is there a fix for CVE-2026-44651?

Yes. sillytavern (npm): upgrade to 1.18.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-44651 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-44651?

Check whether you run sillytavern (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-44651: SillyTavern reflected XSS in CORS proxy middleware

Q: Which products and versions are affected?

sillytavern (npm) <= 1.17.0, SEMVER:introduced=0,fixed=1.18.0.

Q: Is there a fix for CVE-2026-44651?

Yes. sillytavern (npm): upgrade to 1.18.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-44651 attacked?

It is attacked over the network, in a network appliance.

Q: Am I affected by CVE-2026-44651?

Check whether you run sillytavern (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-44651 · Severity: medium · CVSS 4 · Published 2026-05-29

SillyTavern, a user interface for interacting with text generation AI, contains a security flaw in its proxy service. An attacker can use this vulnerability to run malicious scripts in a user's browser if they are tricked into clicking a specifically crafted link. This could lead to the theft of login tokens or unauthorized manipulation of the user's session.

Technologies: sillytavern (npm). Vendors: npm.

Quick answers

Is CVE-2026-44651 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-44651 being exploited in the wild.
How severe is CVE-2026-44651?: Medium severity, with a CVSS score of 4, published 29 May 2026.
Which products and versions are affected?: sillytavern (npm) <= 1.17.0, SEMVER:introduced=0,fixed=1.18.0.
Is there a fix for CVE-2026-44651?: Yes. sillytavern (npm): upgrade to 1.18.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-44651 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-44651?: Check whether you run sillytavern (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

sillytavern (npm): upgrade to 1.18.0 or later
```
npm install sillytavern@1.18.0
```

Technical details

A reflected cross-site scripting (XSS) vulnerability exists in SillyTavern's CORS proxy middleware within `src/middleware/corsProxy.js`. The root cause is the improper neutralization of the `url` parameter in the `GET /proxy/:url(*)` route; when a fetch request fails, the application reflects the raw, unescaped URL back into a 500 error response body. An attacker can exploit this by crafting a URL containing malicious HTML/JavaScript tags. If a victim visits the crafted link, the script executes in their browser context. The issue is fixed in version 1.18.0 by ensuring user-provided URLs are no longer reflected in the response body.

Affected products

SillyTavern SillyTavern <= 1.17.0

Identifiers

CVE-2026-44651
GHSA-xc4x-2452-5gc9

Timeline

2026-05-11: disclosed
2026-05-12: advisory: GitHub Advisory published
2026-05-29: other: NVD published

References

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