CVE-2026-108545

high

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.

References

https://www.vulncheck.com/advisories/sillytavern-1.12.13-through-1.19.0-pre-authentication-denial-of-service-via-body-parsing

https://hackmd.io/@haind/sillytavern-preauth-body-parser-dos

https://github.com/SillyTavern/SillyTavern/blob/1.19.0/src/server-main.js#L110-L150

https://github.com/SillyTavern/SillyTavern

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-96340

Details

Source: Mitre, NVD

Published: 2026-10-10

Updated: 2026-10-10

Risk Information

CVSS v2

Base Score: 5.4

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 5.9

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: Medium

CVSS v4

Base Score: 8.2

Vector: 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

Severity: High