PT-2026-29661 · Unknown · Sillytavern

Kirakira-Dev · Published 2026-04-01 · Updated 2026-04-02 · CVE-2026-34523

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions SillyTavern versions prior to 1.17.0

Description A path traversal vulnerability exists in the static file route handler, allowing unauthenticated users to determine the existence of files on the server's filesystem. Attackers can send percent-encoded '../' sequences (%2E%2E%2F) in requests to static file routes to check for file existence. The vulnerable code is located in the createRouteHandler function (src/users.js:947–963). The vulnerability occurs because req.params[0] is decoded without proper boundary checks, allowing paths like /characters/%2E%2E%2F%2E%2E%2FUsers/kirakira to resolve outside the intended directory. Affected routes include /characters/*, /user/files/*, /assets/*, /user/images/*, /backgrounds/*, and /User%20Avatars/*. While file contents cannot be read, the existence of files can be determined.

Recommendations Update to version 1.17.0 or later.

Exploit

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2026-34523

GHSA-525J-2HRJ-M8FP

Affected Products

Sillytavern

References · 5

• 🔥 https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-525j-2hrj-m8fp · Exploit
• https://osv.dev/vulnerability/GHSA-525j-2hrj-m8fp · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34523 · Security Note
• https://github.com/SillyTavern/SillyTavern · Note
• https://github.com/SillyTavern/SillyTavern/releases/tag/1.17.0 · Note