{"action":"Upgrade pyopenssl to 26.0.0 or later.","affected":[{"fixed":"26.0.0","introduced":"0.14.0"}],"component":"pyopenssl","cve_ids":["CVE-2026-27448"],"ecosystem":"PyPI","epss":0.00256,"exploited":false,"fixed_versions":["26.0.0"],"ghsa_id":"GHSA-vp96-hxj8-p424","id":"tcs_01M5KG0HB9EQYEWKC9P1QVQ1BH","modified_at":"2026-09-10T03:51:00.753013360Z","published_at":"2026-03-16T15:15:43Z","references":["https://osv.dev/vulnerability/GHSA-vp96-hxj8-p424","https://github.com/pyca/pyopenssl/security/advisories/GHSA-vp96-hxj8-p424","https://nvd.nist.gov/vuln/detail/CVE-2026-27448","https://github.com/pyca/pyopenssl/commit/d41a814759a9fb49584ca8ab3f7295de49a85aa0","https://github.com/pyca/pyopenssl","https://github.com/pyca/pyopenssl/blob/358cbf29c4e364c59930e53a270116249581eaa3/CHANGELOG.rst#L27"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GHSA-vp96-hxj8-p424","url":"https://osv.dev/vulnerability/GHSA-vp96-hxj8-p424"},{"source":"nvd","source_id":"CVE-2026-27448","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27448"}],"summary":"pyOpenSSL allows TLS connection bypass via unhandled callback exception in set_tlsext_servername_callback"}