{"action":"Upgrade calibreweb to 0.6.15 or later.","affected":[{"fixed":"0.6.15","introduced":"0"}],"component":"calibreweb","cve_ids":["CVE-2021-4171"],"ecosystem":"PyPI","epss":0.01387,"exploited":false,"fixed_versions":["0.6.15"],"ghsa_id":"GHSA-xp7p-3gx7-j6wx","id":"tcs_01M5KH382JZTZE91ZX09693MHR","modified_at":"2026-07-01T20:22:50.165947Z","published_at":"2026-06-29T11:50:33.865743Z","references":["https://osv.dev/vulnerability/PYSEC-2026-307","https://nvd.nist.gov/vuln/detail/CVE-2021-4171","https://github.com/janeczku/calibre-web/commit/3e0d8763c377d2146462811e3e4ccf13f0d312ce","https://github.com/janeczku/calibre-web","https://huntr.dev/bounties/1117f439-133c-4563-afb2-6cd80607bd5c","https://pypi.org/project/calibreweb","https://github.com/advisories/GHSA-xp7p-3gx7-j6wx"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"PYSEC-2026-307","url":"https://osv.dev/vulnerability/PYSEC-2026-307"}],"summary":"calibre-web is vulnerable to Business Logic Errors"}