CVE-2026-108545 PUBLISHED

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.

• HaiND from the Post and Telecommunication Institute of Technology finder

• https://hackmd.io/@haind/sillytavern-preauth-body-parser-dos
• https://github.com/SillyTavern/SillyTavern
• https://github.com/SillyTavern/SillyTavern/blob/1.19.0/src/server-main.js#L110-L150
• VulnCheck Advisory: SillyTavern 1.12.13 through 1.19.0 Pre-Authentication Denial of Service via Body Parsing

• Uncontrolled Resource Consumption CWE