{"action":"Upgrade granian to 2.7.4 or later.","affected":[{"fixed":"2.7.4","introduced":"1.2.0"}],"component":"granian","cve_ids":["CVE-2026-42544"],"ecosystem":"PyPI","epss":0.0039,"exploited":false,"fixed_versions":["2.7.4"],"ghsa_id":"GHSA-vrg7-482j-p6f6","id":"tcs_01M5KGZW4G4ZHPQMM78TCMNFFQ","modified_at":"2026-07-13T16:31:56.152810045Z","published_at":"2026-07-13T15:15:39.488346Z","references":["https://osv.dev/vulnerability/PYSEC-2026-2503","https://github.com/emmett-framework/granian/security/advisories/GHSA-vrg7-482j-p6f6","https://nvd.nist.gov/vuln/detail/CVE-2026-42544","https://github.com/emmett-framework/granian","https://pypi.org/project/granian","https://github.com/advisories/GHSA-vrg7-482j-p6f6"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"PYSEC-2026-2503","url":"https://osv.dev/vulnerability/PYSEC-2026-2503"}],"summary":"Granian vulnerable to unauthenticated DoS via WebSocket subprotocol header panic"}