gh-142754: Ensure that Element & Attr instances have the ownerDocument attribute #142794
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Element uses __slots__, which means that the attribute is not inherited from the superclass. All other slots (except _localName) are set in __init__; not including ownerDocument was an oversight. Note that creating Element directly is not supported; you're supposed to use Document APIs. All supported ways of creating elements do set ownerDocument. However, many projects ignore the documentation.
encukou
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Here's a test case: def testSetAttributeNodeWithoutOwnerDocument(self):
elem = Element("test")
attr = Attr("id")
attr.value = "test-id"
elem.setAttributeNode(attr)
self.assertEqual(elem.getAttribute("id"), "test-id") |
hugovk
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Dec 16, 2025
encukou
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needs backport to 3.13
miss-islington
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Dec 16, 2025
…ocument attribute (pythonGH-142794) (cherry picked from commit 1cc7551) Co-authored-by: Petr Viktorin <encukou@gmail.com> Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
miss-islington
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Dec 16, 2025
…ocument attribute (pythonGH-142794) (cherry picked from commit 1cc7551) Co-authored-by: Petr Viktorin <encukou@gmail.com> Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
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GH-142818 is a backport of this pull request to the 3.14 branch. |
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GH-142819 is a backport of this pull request to the 3.13 branch. |
Member
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Thanks for the fix! |
Contributor
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Lovely. Does this also close #67624? |
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Elementuses__slots__, which means that the ownerDocumentattribute is not inherited from the superclass.
All other slots (except
_localName) are set in__init__; notincluding ownerDocument was apparently an oversight.
Note that creating
Elementdirectly is not supported; you're supposedto use Document APIs. AFAICS, all supported ways of creating elements do
set
ownerDocument.However, many projects ignore the documentation, and a security fix that
relies on ownerDocument can break them.