CVE-2026-40864

MEDIUM5.4EPSS 0.01%

JupyterHub has cross-origin form POSTs bypass XSRF (CWE-352)

發布日:2026/5/5修改日:2026/6/2

也稱為:DEBIAN-CVE-2026-40864

描述

JupyterHub is software that allows users to create a multi-user server for Jupyter notebooks. In versions 4.1.0 through 5.4.4, XSRF protection (updated in 4.1.0) inappropriately treated requests with Sec-Fetch-Mode: no-cors as same-origin requests, bypassing XSRF checks. The JSON API is not affected, only HTTP form endpoints, such as /hub/spawn and /hub/accept-share, meaning attackers could trigger server spawn (but not access the server) and if the attacker is a JupyterHub user permitted to share access to their server, cause a user to accept a share and have access to the attacker's server. This issue has been fixed in version 5.4.5. If developers are unable to immediately upgrade, they can temporarily mitigate this issue by dropping requests to JupyterHub with Sec-Fetch-Mode: no-cors if they are using a reverse proxy.

受影響套件(3)

Bitnami/jupyterhub>= 4.1.0, < 5.4.5
Debian/jupyterhubfrom 0
PyPI/jupyterhub>= 4.1.0, < 5.4.5

CVSS 分數

來源	版本	嚴重程度	向量
osv	CVSS 3.1	MEDIUM5.4	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

描述

受影響套件(3)

CVSS 分數

參考連結(5)