Descripción
SiYuan versions before v3.8.1 contain a server-side request forgery vulnerability in the http_request and web_fetch agent tools that perform DNS resolution only at guard time without validating the connect-time resolution. Attackers can use DNS rebinding to answer the guard resolution with a public IP and the connect resolution with a private or metadata IP, bypassing the SSRF defense to access cloud instance metadata and internal services.
CVSS 8.2EPSS 0%Riesgo 0.82
Ver fuente- Publicación
- 2026-08-28 12:16:33
- Versiones afectadas
- <3.8.1
- Tipo
- Otro
- Última modificación
- 2026-08-28 12:16:33
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N