{"id":"CVE-2026-7210","revision":"b72ca281e17f4553b7c5c4a0287c3296","records":[{"revision":"b72ca281e17f4553b7c5c4a0287c3296","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-7210","aliases":[],"title":"The expat and elementtree parsers use insufficient entropy for XML hash-flooding protection","description":"`xml.parsers.expat` and `xml.etree.ElementTree` use insufficient entropy for Expat hash-flooding protection, which allows a crafted XML document to trigger hash flooding.\\r\\n\\r\\nFully mitigating this vulnerability requires both updating libexpat to 2.8.0 or later and applying this patch.","state":0,"publishedAt":"2026-05-11T17:19:09.784+00:00","modifiedAt":"2026-10-02T00:35:51.824+00:00","affected":[{"ecosystem":"Vendor product","name":"CPython","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"modules\": [\n                        \"xml\",\n                        \"expat\"\n                    ],\n                    \"product\": \"CPython\",\n                    \"repo\": \"https://github.com/python/cpython\",\n                    \"vendor\": \"Python Software Foundation\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.10.22\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"python\"\n                        },\n                        {\n                            \"version\": \"3.11.0\",\n                            \"lessThan\": \"3.11.16\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"python\"\n                        },\n                        {\n                            \"version\": \"3.12.0\",\n                            \"lessThan\": \"3.12.14\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"python\"\n                        },\n                        {\n                            \"version\": \"3.13.0\",\n                            \"lessThan\": \"3.13.14\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"python\"\n                        },\n                        {\n                            \"version\": \"3.14.0\",\n                            \"lessThan\": \"3.14.6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"python\"\n                        },\n                        {\n                            \"version\": \"3.15.0a1\",\n                            \"lessThan\": \"3.15.0b2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"python\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","score":6.3,"severity":"MEDIUM"}],"references":["https://mail.python.org/archives/list/security-announce@python.org/thread/PNY5OMBDPM2FRUZTWFFPJ6LISWKV627K/","https://github.com/python/cpython/pull/149023","https://github.com/python/cpython/issues/149018","https://github.com/python/cpython/commit/24b8f12544468e4cedf5bfbe25442fcd495391e4","https://github.com/python/cpython/commit/3573b3b1ecbd99030a0b18658e1bfece771b2566","https://github.com/python/cpython/commit/eeea765cb9d8f1fc3d8918b272ac3c477983f27a","https://github.com/python/cpython/commit/fc9b11ff49cbc82e6f917d07a61517a2b5f3145f","https://github.com/python/cpython/commit/e37df2a6a71d6538698e2d3188a7c345b827640b","https://github.com/python/cpython/commit/cbaecf9f16da611a646d507c1cbca265c588fc56","https://github.com/python/cpython/commit/ea70712d1a8508e14e9677d44f838dab04dc0286"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-7210","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-7210","identifiers":["CVE-2026-7210"]},"retained":false,"historicalAffected":[]}],"coverage":[]}