{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"jupyter-server","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":[],"id":"tcs_01M5NW0SHHHR0RSMAAPP22NJ6R","modified_at":"2026-09-25T08:47:25.594981316Z","published_at":"2026-09-17T21:17:50.213Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-86049","https://security-tracker.debian.org/tracker/CVE-2026-86049"],"severity":{"label":"high","score":7.1},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-86049","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-86049"}],"summary":"Jupyter Server is the backend for Jupyter web applications. Prior to version 2.21.0, the 5xx request logging path in jupyter_server/log.py copies the Referer header into a JSON header block without ap"}