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.

如何修補 CVE-2026-40864

要修補 CVE-2026-40864,請將受影響套件升級到下列已修補版本。

• —升級至 5.4.5 或更新版本
• —升級至 5.4.5 或更新版本
• —升級至 5.4.5 或更新版本

CVE-2026-40864 正在被利用嗎?

低 — EPSS 為 0.2%,目前沒有觀察到大規模利用活動。

受影響套件(3)

• >= 4.1.0, < 5.4.5
• >= 4.1.0, < 5.4.5
• >= 4.1.0, < 5.4.5

CVSS 分數

參考連結(4)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-40864
• PATCHgithub.com/jupyterhub/jupyterhub
• WEBgithub.com/jupyterhub/jupyterhub/commit/9c5ec277d3cda5a59de2d8c8117efa77bd941127
• WEBgithub.com/jupyterhub/jupyterhub/security/advisories/GHSA-m68r-v472-jgq9