Vulnerability · Published Oct 10, 2026 · Assigned by VulnCheck
CVE-2026-108545SillyTavern 1.12.13 through 1.19.0 Pre-Authentication Denial of Service via Body Parsing
Medium 5.9
In plain English
A medium-severity uncontrolled resource consumption in SillyTavern from SillyTavern. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).
Official description
SillyTavern 1.12.13 through 1.19.0 contains a denial of service vulnerability that allows unauthenticated remote attackers to exhaust resources because body-parser middleware runs before authentication and whitelist checks. Attackers can send large or compressed JSON or urlencoded bodies up to 500 MB, optionally in parallel, to exhaust memory and CPU and deny service.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SillyTavern | SillyTavern | 1.12.13 – through 1.19.0 |
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://hackmd.io/@haind/sillytavern-preauth-body-parser-dos technical-description, exploit
- https://github.com/SillyTavern/SillyTavern product
- https://github.com/SillyTavern/SillyTavern/blob/1.19.0/src/server-main.js#L110-L150 technical-description
- VulnCheck Advisory: SillyTavern 1.12.13 through 1.19.0 Pre-Authentication Denial of Service via Body Parsing third-party-advisory