CVE-2026-44650: SillyTavern path traversal and directory deletion in extensions API

CVE-2026-44650 · Severity: critical · CVSS 9.1 · Published 2026-05-29

SillyTavern is a user interface for interacting with AI models. A security flaw allows unauthenticated users to remotely delete all installed extensions on the system. This results in the permanent loss of third-party tools and configurations, potentially disrupting the user's AI workflows and requiring a full reinstallation of extensions.

Technologies: sillytavern (npm). Vendors: npm.

Quick answers

Is CVE-2026-44650 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-44650 being exploited in the wild.
How severe is CVE-2026-44650?
Critical severity, with a CVSS score of 9.1, 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-2026-44650?
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-2026-44650 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-44650?
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 path traversal vulnerability exists in the 'POST /api/extensions/delete' endpoint (and several related endpoints) due to improper input validation. The application uses the 'sanitize-filename' library, which converts a single dot (".") into an empty string. When this empty string is passed to 'path.join(basePath, "")', it resolves to the 'basePath' itself—the root extensions directory. Because the application performs a recursive deletion ('fs.promises.rm' with 'recursive: true') on the resulting path, an attacker can wipe the entire extensions folder. This requires no authentication in default configurations and can be exploited via a single HTTP request. The issue is fixed in version 1.18.0 by validating the input after sanitization.

Affected products

  • SillyTavern SillyTavern <= 1.17.0

Identifiers

  • CVE-2026-44650
  • GHSA-886q-f44j-h6wh

Timeline

  • 2026-05-11: advisory: GitHub Security Advisory published
  • 2026-05-29: disclosed: CVE published to NVD
  • 2026-05-29: patched: Vulnerability fixed in version 1.18.0

References

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