{"action":"Upgrade lxml to 4.6.5 or later.","affected":[{"fixed":"4.6.5","introduced":"0"}],"component":"lxml","cve_ids":["CVE-2021-43818"],"ecosystem":"PyPI","epss":0.02663,"exploited":false,"fixed_versions":["4.6.5"],"ghsa_id":"GHSA-55x5-fj6c-h6m8","id":"tcs_01M5KF02ZW5NDK24RJRNC3PTDX","modified_at":"2026-07-08T06:28:08.789724998Z","published_at":"2021-12-13T18:14:36Z","references":["https://osv.dev/vulnerability/GHSA-55x5-fj6c-h6m8","https://github.com/lxml/lxml/security/advisories/GHSA-55x5-fj6c-h6m8","https://nvd.nist.gov/vuln/detail/CVE-2021-43818","https://github.com/lxml/lxml/commit/12fa9669007180a7bb87d990c375cf91ca5b664a","https://github.com/lxml/lxml/commit/a3eacbc0dcf1de1c822ec29fb7d090a4b1712a9c#diff-59130575b4fb2932c957db2922977d7d89afb0b2085357db1a14615a2fcad776","https://github.com/lxml/lxml/commit/f2330237440df7e8f39c3ad1b1aa8852be3b27c0","https://www.oracle.com/security-alerts/cpujul2022.html","https://www.oracle.com/security-alerts/cpuapr2022.html","https://www.debian.org/security/2022/dsa-5043","https://security.netapp.com/advisory/ntap-20220107-0005","https://security.gentoo.org/glsa/202208-06","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZQ4SPKJX3RRJK4UWA6FXCRHD2TVRQI44","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WZGNET2A4WGLSUXLBFYKNC5PXHQMI3I7","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/V2XMOM5PFT6U5AAXY6EFNT5JZCKKHK2V","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TUIS2KE3HZ2AAQKXFLTJFZPP2IFHJTC7","https://lists.debian.org/debian-lts-announce/2021/12/msg00037.html","https://github.com/pypa/advisory-database/tree/main/vulns/lxml/PYSEC-2021-852.yaml","https://github.com/lxml/lxml"],"severity":{"label":"high","score":8.2},"sources":[{"source":"osv","source_id":"GHSA-55x5-fj6c-h6m8","url":"https://osv.dev/vulnerability/GHSA-55x5-fj6c-h6m8"}],"summary":"lxml's HTML Cleaner allows crafted and SVG embedded scripts to pass through"}