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python · jupyter-serverCrítico

jupyter-server: XSS fix in nbconvert HTTP handlers

Fixed stored XSS vulnerability in nbconvert HTTP handlers where user-authored notebook HTML was rendered without a sandbox directive in Content-Security-Policy,

19 Jun 2026Leitura 1 minSeveridade: mexe agora

O que mudou

Fixed stored XSS vulnerability in nbconvert HTTP handlers where user-authored notebook HTML was rendered without a sandbox directive in Content-Security-Policy, allowing token exfiltration and kernel RCE.

Quem isso afeta

All users of jupyter_server prior to v2.20.0 who serve untrusted notebooks via /nbconvert/html/.

O que fazer hoje

Atualize para jupyter_server v2.20.0 ou aplique o workaround em jupyter_server_config.py.

A esteira
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