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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, POST /api/extensions/delete endpoint accepts extensionName: "." which bypasses sanitize-filename validation, causing the entire user extensions directory to be recursively deleted. No authentication is required in the default configuration. This vulnerability is fixed in 1.18.0.

PUBLISHED Reserved 2026-05-07 | Published 2026-05-29 | Updated 2026-05-29 | Assigner GitHub_M




CRITICAL: 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Problem types

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Product status

< 1.18.0
affected

References

github.com/...Tavern/security/advisories/GHSA-886q-f44j-h6wh exploit

github.com/...Tavern/security/advisories/GHSA-886q-f44j-h6wh

cve.org (CVE-2026-44650)

nvd.nist.gov (CVE-2026-44650)

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