CVE-2026-108545
SillyTavern 1.12.13 through 1.19.0 Pre-Authentication Denial of Service via Body Parsing
- State
- Published
- Severity
- 8.2 High
- Published
- Oct 10, 2026
- Updated
- Oct 14, 2026
- Reserved
- Oct 10, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.2 High | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.9 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-400 Uncontrolled Resource Consumption
Affected Products
| Product | Versions |
|---|---|
SillyTavernSillyTavern |
|
References
- https://hackmd.io/@haind/sillytavern-preauth-body-parser-dostechnical-descriptionexploit
- https://github.com/SillyTavern/SillyTavernproduct
- https://github.com/SillyTavern/SillyTavern/blob/1.19.0/src/server-main.js#L110-L150technical-description
- VulnCheck Advisory: SillyTavern 1.12.13 through 1.19.0 Pre-Authentication Denial of Service via Body Parsingthird-party-advisory
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