{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-4224","assignerOrgId":"28c92f92-d60d-412d-b760-e73465c3df22","state":"PUBLISHED","assignerShortName":"PSF","dateReserved":"2026-03-15T18:10:54.886Z","datePublished":"2026-03-16T17:52:26.639Z","dateUpdated":"2026-04-08T12:55:03.693Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"CPython","repo":"https://github.com/python/cpython","vendor":"Python Software Foundation","versions":[{"version":"0","lessThan":"3.13.13","status":"affected","versionType":"python"},{"version":"3.14.0","lessThan":"3.14.4","status":"affected","versionType":"python"},{"version":"3.15.0a1","lessThan":"3.15.0a8","status":"affected","versionType":"python"}]}],"credits":[{"lang":"en","type":"reporter","value":"Gil Portnoy"},{"lang":"en","type":"remediation developer","value":"Stan Ulbrych"},{"lang":"en","type":"remediation reviewer","value":"Bénédikt Tran"},{"lang":"en","type":"coordinator","value":"Stan Ulbrych"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"When an Expat parser with a registered ElementDeclHandler parses an inline\ndocument type definition containing a deeply nested content model a C stack\noverflow occurs."}],"value":"When an Expat parser with a registered ElementDeclHandler parses an inline\ndocument type definition containing a deeply nested content model a C stack\noverflow occurs."}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"providerMetadata":{"orgId":"28c92f92-d60d-412d-b760-e73465c3df22","shortName":"PSF","dateUpdated":"2026-04-08T12:55:03.693Z"},"references":[{"tags":["patch"],"url":"https://github.com/python/cpython/commit/eb0e8be3a7e11b87d198a2c3af1ed0eccf532768"},{"tags":["vendor-advisory"],"url":"https://mail.python.org/archives/list/security-announce@python.org/thread/5M7CGUW3XBRY7II4DK43KF7NQQ3TPZ6R/"},{"tags":["issue-tracking"],"url":"https://github.com/python/cpython/issues/145986"},{"tags":["patch"],"url":"https://github.com/python/cpython/pull/145987"},{"tags":["patch"],"url":"https://github.com/python/cpython/commit/196edfb06a7458377d4d0f4b3cd41724c1f3bd4a"},{"tags":["patch"],"url":"https://github.com/python/cpython/commit/e0a8a6da90597a924b300debe045cdb4628ee1f3"},{"tags":["patch"],"url":"https://github.com/python/cpython/commit/642865ddf4b232da1f3b1f7abcfa3254c4bfe785"},{"tags":["patch"],"url":"https://github.com/python/cpython/commit/af856a7177326ac25d9f66cc6dd28b554d914fee"}],"source":{"discovery":"UNKNOWN"},"title":"Stack overflow parsing XML with deeply nested DTD content models","x_generator":{"engine":"Vulnogram 0.6.0"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-674","lang":"en","description":"CWE-674 Uncontrolled Recursion"}]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-16T18:20:48.548008Z","id":"CVE-2026-4224","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-16T18:21:11.567Z"}},{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/03/16/4"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-03-16T23:08:21.692Z"}}]}}