CVE-2026-108545SillyTavern 1.12.13 through 1.19.0 Pre-Authentication Denial of Service via Body Parsing
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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.
- CVSS
- 5.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-400
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 10, 2026
Affected products
SillyTavern SillyTavern sillytavern:sillytavern (from the name) | from 1.12.13 through 1.19.0 | CNA record |
References
- https://hackmd.io/@haind/sillytavern-preauth-body-parser-dostechnical-description, exploit
- https://github.com/SillyTavern/SillyTavernproduct
- https://github.com/SillyTavern/SillyTavern/blob/1.19.0/src/server-main.js#L110-L150technical-description
- https://www.vulncheck.com/advisories/sillytavern-1.12.13-through-1.19.0-pre-authentication-denial-of-service-via-body-parsingthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.