Resource exhaustion in Sillytavern
CVE-2026-108545
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@haind/sillytavern-preauth-body-parser-dos (technical-description, exploit)
- github.com/SillyTavern/SillyTavern (product)
- github.com/SillyTavern/SillyTavern/blob/1.19.0/src/server-main.js (technical-description)
- www.vulncheck.com/advisories/sillytavern-1.12.13-through-1.19.0-pre-authenticat… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-108545?
- CVE-2026-108545 is a medium-severity vulnerability in Sillytavern, classified under Uncontrolled Resource Consumption. CVSS score: 5.9/10. Published 2026-10-10.
- How severe is CVE-2026-108545?
- Medium severity. CVSS v3 base score is 5.9 out of 10.