CVE-2026-108545
SillyTavern 1.12.13 through 1.19.0 Pre-Authentication Denial of Service via Body Parsing
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-400 |
| Vendor | sillytavern |
| Product | sillytavern |
| Published | Oct 10, 2026 |
Stay Ahead of the Next One
Get instant alerts for sillytavern sillytavern
Be the first to know when new medium vulnerabilities affecting sillytavern sillytavern are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
SillyTavern / SillyTavern
1.12.13 ≤ 1.19.0
References
hackmd.io: https://hackmd.io/@haind/sillytavern-preauth-body-parser-dos github.com: https://github.com/SillyTavern/SillyTavern github.com: https://github.com/SillyTavern/SillyTavern/blob/1.19.0/src/server-main.js#L110-L150 vulncheck.com: https://www.vulncheck.com/advisories/sillytavern-1.12.13-through-1.19.0-pre-authentication-denial-of-service-via-body-parsing
Credits
HaiND from the Post and Telecommunication Institute of Technology