{"id":"CVE-2026-7210","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-7210","generatedAt":"2026-10-28T05:58:38.051Z","title":"`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…","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.","published":"2026-05-11T18:16:42.000Z","lastModified":"2026-10-26T18:10:00.000Z","status":"Modified","sourceIdentifier":"cna@python.org","cvss":{"version":"4.0","score":6.3,"severity":"MEDIUM","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-331"],"affected":["python/python"],"epss":{"score":0.00672,"percentile":0.51845,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.67%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/python/cpython/commit/24b8f12544468e4cedf5bfbe25442fcd495391e4","tags":["Patch"],"source":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/3573b3b1ecbd99030a0b18658e1bfece771b2566","tags":["Patch"],"source":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/cbaecf9f16da611a646d507c1cbca265c588fc56","source":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/e37df2a6a71d6538698e2d3188a7c345b827640b","source":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/ea70712d1a8508e14e9677d44f838dab04dc0286","source":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/eeea765cb9d8f1fc3d8918b272ac3c477983f27a","tags":["Patch"],"source":"cna@python.org"},{"url":"https://github.com/python/cpython/commit/fc9b11ff49cbc82e6f917d07a61517a2b5f3145f","tags":["Patch"],"source":"cna@python.org"},{"url":"https://github.com/python/cpython/issues/149018","tags":["Issue Tracking"],"source":"cna@python.org"},{"url":"https://github.com/python/cpython/pull/149023","tags":["Issue Tracking","Patch"],"source":"cna@python.org"},{"url":"https://mail.python.org/archives/list/security-announce@python.org/thread/PNY5OMBDPM2FRUZTWFFPJ6LISWKV627K/","tags":["Mailing List","Third Party Advisory"],"source":"cna@python.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/05/11/13","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2026/05/11/8","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-7210","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}