{"action":"Upgrade nicegui to 3.5.0 or later.","affected":[{"fixed":"3.5.0","introduced":"2.10.0"}],"component":"nicegui","cve_ids":["CVE-2026-21874"],"ecosystem":"PyPI","epss":0.00554,"exploited":false,"fixed_versions":["3.5.0"],"ghsa_id":"GHSA-mp55-g7pj-rvm2","id":"tcs_01M5KGV66F1VDT5SJSK0T2DAZ9","modified_at":"2026-07-07T17:46:55.797283654Z","published_at":"2026-07-07T16:03:17.363696Z","references":["https://osv.dev/vulnerability/PYSEC-2026-1703","https://github.com/zauberzeug/nicegui/security/advisories/GHSA-mp55-g7pj-rvm2","https://nvd.nist.gov/vuln/detail/CVE-2026-21874","https://github.com/zauberzeug/nicegui/commit/6c52eb2c90c4b67387c025b29646b4bc1578eb83","https://github.com/zauberzeug/nicegui","https://github.com/zauberzeug/nicegui/releases/tag/v3.5.0","https://pypi.org/project/nicegui","https://github.com/advisories/GHSA-mp55-g7pj-rvm2"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"PYSEC-2026-1703","url":"https://osv.dev/vulnerability/PYSEC-2026-1703"}],"summary":"NiceGUI has Redis connection leak via tab storage causes service degradation"}