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cpython/Modules/expat
Sebastian Pipping bc36bd1786 [3.13] gh-90949: add Expat API to prevent XML deadly allocations (CVE-2025-59375) (GH-139234) (#139367)
* gh-90949: add Expat API to prevent XML deadly allocations (CVE-2025-59375) (#139234)

Expose the XML Expat 2.7.2 mitigation APIs to disallow use of
disproportional amounts of dynamic memory from within an Expat
parser (see CVE-2025-59375 for instance).

The exposed APIs are available on Expat parsers, that is,
parsers created by `xml.parsers.expat.ParserCreate()`, as:

- `parser.SetAllocTrackerActivationThreshold(threshold)`, and
- `parser.SetAllocTrackerMaximumAmplification(max_factor)`.

(cherry picked from commit f04bea44c3)
(cherry picked from commit 68a1778b77)
2025-11-02 12:39:11 +00:00
..