Jupyter Server: 5xx request logging leaks token-bearing Referer header values
High-risk advisory
CVE-2026-86049
Summary
Jupyter Server: 5xx request logging leaks token-bearing Referer header values
Why it matters
GitHub has published a reviewed security advisory for jupyter_server. Prioritize it with other application dependency updates.
Operator check
Check whether jupyter_server is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.