7.5

CVE-2026-4224

Stack overflow parsing XML with deeply nested DTD content models

When an Expat parser with a registered ElementDeclHandler parses an inline
document type definition containing a deeply nested content model a C stack
overflow occurs.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Python ≫ Python Version < 3.10.0
Python ≫ Python Version >= 3.13.0 < 3.13.13
Python ≫ Python Version >= 3.14.0 < 3.14.4
Python ≫ Python Version3.15.0 Updatealpha1
Python ≫ Python Version3.15.0 Updatealpha2
Python ≫ Python Version3.15.0 Updatealpha3
Python ≫ Python Version3.15.0 Updatealpha4
Python ≫ Python Version3.15.0 Updatealpha5
Python ≫ Python Version3.15.0 Updatealpha6
Python ≫ Python Version3.15.0 Updatealpha7
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.62% 0.45
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
cna@python.org 6 0 0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE-674 Uncontrolled Recursion

The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

https://github.com/python/cpython/commit/196edfb06a7458377d4d0f4b3cd41724c1f3bd4a
Patch
https://github.com/python/cpython/commit/e0a8a6da90597a924b300debe045cdb4628ee1f3
Patch
https://github.com/python/cpython/commit/eb0e8be3a7e11b87d198a2c3af1ed0eccf532768
Patch
https://github.com/python/cpython/issues/145986
Issue Tracking
https://github.com/python/cpython/pull/145987
Patch
https://mail.python.org/archives/list/security-announce@python.org/thread/5M7CGUW3XBRY7II4DK43KF7NQQ3TPZ6R/
Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/03/16/4
Third Party Advisory
Mailing List
https://github.com/python/cpython/commit/642865ddf4b232da1f3b1f7abcfa3254c4bfe785
Patch
https://github.com/python/cpython/commit/af856a7177326ac25d9f66cc6dd28b554d914fee
Patch