What’s Vulnerable › Vulnerabilities

CVE-2026-108545: SillyTavern 1.12.13 through 1.19.0 Pre-Authentication Denial of Service via Body Parsing

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-10 · updated 2026-10-14
• Weakness: CWE-400

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.

Affected products

• SillyTavern: from 1.12.13 through 1.19.0

References

• https://github.com/SillyTavern/SillyTavern
• https://github.com/SillyTavern/SillyTavern/blob/1.19.0/src/server-main.js#L110-L150
• https://hackmd.io/@haind/sillytavern-preauth-body-parser-dos
• https://www.vulncheck.com/advisories/sillytavern-1.12.13-through-1.19.0-pre-authentication-denial-of-service-via-body-parsing

Get alerted when CVE-2026-108545 or the next vulnerability affects your stack