---
id: CVE-2026-108545
title: >-
  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
summary: >-
  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…
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
published: '2026-10-10'
updated: '2026-10-10'
sourceUpdated: '2026-10-10T15:16:57.530'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-108545'
references:
  - url: 'https://github.com/SillyTavern/SillyTavern'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/SillyTavern/SillyTavern/blob/1.19.0/src/server-main.js#L110-L150
    label: disclosure@vulncheck.com
  - url: 'https://hackmd.io/@haind/sillytavern-preauth-body-parser-dos'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/sillytavern-1.12.13-through-1.19.0-pre-authentication-denial-of-service-via-body-parsing
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-10T15:25:58.086Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.