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Title: [3.14] gh-90949: add Expat API to prevent XML deadly allocations (CVE-2025-59375) (GH-139234) by picnixz · Pull Request #139359 · python/cpython · GitHub

Open Graph Title: [3.14] gh-90949: add Expat API to prevent XML deadly allocations (CVE-2025-59375) (GH-139234) by picnixz · Pull Request #139359 · python/cpython

X Title: [3.14] gh-90949: add Expat API to prevent XML deadly allocations (CVE-2025-59375) (GH-139234) by picnixz · Pull Request #139359 · python/cpython

Description: 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 commits f04bea4 and 68a1778) Issue: gh-90949 📚 Documentation preview 📚: https://cpython-previews--139359.org.readthedocs.build/

Open Graph Description: 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...

X Description: 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...

Opengraph URL: https://github.com/python/cpython/pull/139359

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[3.14] gh-90949: add Expat API to prevent XML deadly allocations (CVE-2025-59375) (GH-139234) https://github.com/python/cpython/pull/139359/files#top
Show all changes 9 commits https://github.com/python/cpython/pull/139359/files
3c430ec [3.14] gh-90949: add Expat API to prevent XML deadly allocations (CVE… picnixz Sep 26, 2025 https://github.com/python/cpython/pull/139359/commits/3c430ec58afc2dae872e2cff26af441b0c3888e0
ced3c5d Merge branch '3.14' into backport-f04bea4-3.14 picnixz Sep 28, 2025 https://github.com/python/cpython/pull/139359/commits/ced3c5daf1ab0c1b5ec1b9d1d09c9df633386503
b52fc88 gh-90949: amend GH-139234 in prevision of future mitigation API (#139… picnixz Sep 26, 2025 https://github.com/python/cpython/pull/139359/commits/b52fc8829759e9ae63b19b857c892665c3f29ca1
992018f Merge branch '3.14' into backport-f04bea4-3.14 picnixz Oct 5, 2025 https://github.com/python/cpython/pull/139359/commits/992018fb7129bd1367f165bce1adb007fbddcadc
6fb5cd8 Merge branch '3.14' into backport-f04bea4-3.14 picnixz Oct 7, 2025 https://github.com/python/cpython/pull/139359/commits/6fb5cd8dbf46c8cedf977b777b09038738a69d12
c13d940 Merge branch '3.14' into backport-f04bea4-3.14 picnixz Oct 26, 2025 https://github.com/python/cpython/pull/139359/commits/c13d94046d7839c26809ab8ea93974d62385c1ac
41b0aa2 fix docs picnixz Oct 26, 2025 https://github.com/python/cpython/pull/139359/commits/41b0aa2f09cf64573dee2efc7ed5e654e910532c
52edaa7 Revert "fix docs" picnixz Oct 26, 2025 https://github.com/python/cpython/pull/139359/commits/52edaa762c96390f6efe66f5a87867c56beeec3c
0e60215 Merge branch '3.14' into backport-f04bea4-3.14 picnixz Nov 2, 2025 https://github.com/python/cpython/pull/139359/commits/0e602154c26bcc8245fefb36981ed40320166ddc
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