Add issue number

Author: StanFromIreland

Lib/test/test_pyexpat.py

@@ -706,11 +706,13 @@ def test_trigger_leak(self):
     @support.skip_wasi_stack_overflow()
     def test_deeply_nested_content_model(self):
         # This should raise a RecursionError and not crash.
-        # See https://github.com/python/cpython/issues/
+        # See https://github.com/python/cpython/issues/145986
         N = 500_000
-        data = (b'<!DOCTYPE root [\n<!ELEMENT root '
+        data = (
+                b'<!DOCTYPE root [\n<!ELEMENT root '
               + b'(a, ' * N + b'a' + b')' * N
-              + b'>\n]>\n<root/>\n')
+              + b'>\n]>\n<root/>\n'
+        )
 
         parser = expat.ParserCreate()
         parser.ElementDeclHandler = lambda _1, _2: None

…3-14-17-31-39.gh-issue-111111.ifSSr8.rst …3-14-17-31-39.gh-issue-145986.ifSSr8.rstMisc/NEWS.d/next/Library/2026-03-14-17-31-39.gh-issue-111111.ifSSr8.rst renamed to Misc/NEWS.d/next/Security/2026-03-14-17-31-39.gh-issue-145986.ifSSr8.rst Misc/NEWS.d/next/Library/2026-03-14-17-31-39.gh-issue-111111.ifSSr8.rst renamed to Misc/NEWS.d/next/Security/2026-03-14-17-31-39.gh-issue-145986.ifSSr8.rst

@@ -1,3 +1,4 @@
 :mod:`xml.parsers.expat`: Fixed a crash caused by unbounded C recursion when
 converting deeply nested XML content models with
 :meth:`~xml.parsers.expat.xmlparser.ElementDeclHandler`.
+This addresses :cve:`2026-4224`.