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Title: [3.14] gh-90949: expose Expat API to tune exponential expansion protections (GH-139368) by StanFromIreland · Pull Request #150496 · python/cpython · GitHub

Open Graph Title: [3.14] gh-90949: expose Expat API to tune exponential expansion protections (GH-139368) by StanFromIreland · Pull Request #150496 · python/cpython

X Title: [3.14] gh-90949: expose Expat API to tune exponential expansion protections (GH-139368) by StanFromIreland · Pull Request #150496 · python/cpython

Description: Expose the XML Expat 2.7.2 APIs to tune protections against "billion laughs" 1 attacks. The exposed APIs are available on Expat parsers, that is, parsers created by xml.parsers.expat.ParserCreate(), as: parser.SetBillionLaughsAttackProtectionActivationThreshold(threshold), and parser.SetBillionLaughsAttackProtectionMaximumAmplification(max_factor). This completes the work in f04bea4, and improves the existing related documentation. Issue: gh-90949

Open Graph Description: Expose the XML Expat 2.7.2 APIs to tune protections against "billion laughs" 1 attacks. The exposed APIs are available on Expat parsers, that is, parsers created by xml.parsers.expat.Pars...

X Description: Expose the XML Expat 2.7.2 APIs to tune protections against "billion laughs" 1 attacks. The exposed APIs are available on Expat parsers, that is, parsers created by xml.parsers.ex...

Opengraph URL: https://github.com/python/cpython/pull/150496

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8615892 [3.14] gh-90949: expose Expat API to tune exponential expansion prote… picnixz Sep 28, 2025 https://github.com/python/cpython/pull/150496/commits/8615892f32a319bd5dcba052b7f4bf90a6393765
1493ed4 Fix some extraneous whitespace StanFromIreland May 27, 2026 https://github.com/python/cpython/pull/150496/commits/1493ed4fffb015b068e997a11d2302e24107785b
6f53983 Whoops, re-indent after a previous un-indent StanFromIreland Jun 9, 2026 https://github.com/python/cpython/pull/150496/commits/6f539839cf33cb4cddb17ecd0b23af3883f35868
a35a24a Apply suggestion from @StanFromIreland StanFromIreland Jun 9, 2026 https://github.com/python/cpython/pull/150496/commits/a35a24a4a3ea1916b25524cc13fa45a6f9313506
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