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Title: gh-90949: add Expat API to prevent XML deadly allocations by picnixz · Pull Request #139234 · python/cpython · GitHub

Open Graph Title: gh-90949: add Expat API to prevent XML deadly allocations by picnixz · Pull Request #139234 · python/cpython

X Title: gh-90949: add Expat API to prevent XML deadly allocations by picnixz · Pull Request #139234 · python/cpython

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Open Graph Description: @hartwork I observed that the maximum allocation factor is only checked if we exceed the activation threshold. The online docs for Expat didn't explicitly mention it so I mentioned it in our do...

X Description: @hartwork I observed that the maximum allocation factor is only checked if we exceed the activation threshold. The online docs for Expat didn't explicitly mention it so I mentioned it in ou...

Opengraph URL: https://github.com/python/cpython/pull/139234

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Sep 22, 2025 https://github.com/python/cpython/pull/139234#ref-pullrequest-3442186069
xmlwf: Resolve use of functions XML_GetErrorLineNumber and XML_GetErrorColumnNumber libexpat/libexpat#1053 https://github.com/libexpat/libexpat/pull/1053
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September 22, 2025 20:37https://github.com/python/cpython/pull/139234#commits-pushed-b951065
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use better test nameshttps://github.com/python/cpython/pull/139234/commits/b9510650de13c2b688e198f2df5fc0c7e0b9fca2
b951065https://github.com/python/cpython/pull/139234/commits/b9510650de13c2b688e198f2df5fc0c7e0b9fca2
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simplify roles usagehttps://github.com/python/cpython/pull/139234/commits/e11bf14f1f6d84ee16812f0c022699b7f7eab2b5
e11bf14https://github.com/python/cpython/pull/139234/commits/e11bf14f1f6d84ee16812f0c022699b7f7eab2b5
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Sep 28, 2025 https://github.com/python/cpython/pull/139234#ref-commit-b52fc88
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pythongh-90949https://github.com/python/cpython/issues/90949
: amendhttps://github.com/picnixz/cpython/commit/b52fc8829759e9ae63b19b857c892665c3f29ca1
pythonGH-139234https://github.com/python/cpython/pull/139234
in prevision of future mitigati…https://github.com/picnixz/cpython/commit/b52fc8829759e9ae63b19b857c892665c3f29ca1
b52fc88https://github.com/picnixz/cpython/commit/b52fc8829759e9ae63b19b857c892665c3f29ca1
python#139366https://github.com/python/cpython/pull/139366
f04bea4https://github.com/picnixz/cpython/commit/f04bea44c37793561d753dd4ca6e7cd658137553
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hartworkhttps://github.com/hartwork
Sep 28, 2025https://github.com/python/cpython/pull/139234#issuecomment-3343574246
@picnixzhttps://github.com/picnixz
gh-115398: Expose Expat >=2.6.0 reparse deferral API (CVE-2023-52425) #115623https://github.com/python/cpython/pull/115623
gh-115398: Suggest use of hasattr with checking for 3.13 Expat API availability #116278https://github.com/python/cpython/pull/116278
gh-115399: Document CVE-2023-52425 under "XML vulnerabilities" #115400https://github.com/python/cpython/pull/115400
CVE-2025-59375https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
@picnixzhttps://github.com/picnixz
#116278https://github.com/python/cpython/pull/116278
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Sep 28, 2025https://github.com/python/cpython/pull/139234#issuecomment-3343674992
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Sep 28, 2025https://github.com/python/cpython/pull/139234#issuecomment-3343701835
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Sep 28, 2025 https://github.com/python/cpython/pull/139234#ref-pullrequest-3457954455
[3.14] gh-90949: add Expat API to prevent XML deadly allocations (CVE-2025-59375) (GH-139234) #139359 https://github.com/python/cpython/pull/139359
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Sep 28, 2025https://github.com/python/cpython/pull/139234#issuecomment-3343906272
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Sep 28, 2025https://github.com/python/cpython/pull/139234#issuecomment-3343977134
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#115623https://github.com/python/cpython/pull/115623
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Sep 28, 2025https://github.com/python/cpython/pull/139234#issuecomment-3344012598
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https://github.com/python/cpython/blob/main/Lib/xml/sax/expatreader.py#L284-L295https://github.com/python/cpython/blob/main/Lib/xml/sax/expatreader.py#L284-L295
Please reload this pagehttps://github.com/python/cpython/pull/139234
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Oct 2, 2025 https://github.com/python/cpython/pull/139234#ref-commit-aeefb63
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https://github.com/hartwork
[3.12]https://github.com/hartwork/cpython/commit/aeefb6374ea12bea1789d8a3c82ce270f689ec1b
pythongh-90949https://github.com/python/cpython/issues/90949
: add Expat API to prevent XML deadly allocations (https://github.com/hartwork/cpython/commit/aeefb6374ea12bea1789d8a3c82ce270f689ec1b
aeefb63https://github.com/hartwork/cpython/commit/aeefb6374ea12bea1789d8a3c82ce270f689ec1b
CVE-2025-59375https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
pythonGH-139234https://github.com/python/cpython/pull/139234
CVE-2025-59375https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
f04bea4https://github.com/hartwork/cpython/commit/f04bea44c37793561d753dd4ca6e7cd658137553
hartworkhttps://github.com/hartwork
Oct 2, 2025 https://github.com/python/cpython/pull/139234#ref-commit-a5d026a
https://github.com/picnixz
https://github.com/hartwork
pythongh-90949https://github.com/python/cpython/issues/90949
: amendhttps://github.com/hartwork/cpython/commit/a5d026aa2975c9d817f5273b2584666801c5e570
pythonGH-139234https://github.com/python/cpython/pull/139234
in prevision of future mitigati…https://github.com/hartwork/cpython/commit/a5d026aa2975c9d817f5273b2584666801c5e570
a5d026ahttps://github.com/hartwork/cpython/commit/a5d026aa2975c9d817f5273b2584666801c5e570
python#139366https://github.com/python/cpython/pull/139366
f04bea4https://github.com/hartwork/cpython/commit/f04bea44c37793561d753dd4ca6e7cd658137553
68a1778https://github.com/hartwork/cpython/commit/68a1778b7721f3fb853cd3aa674f7039c2a4df36
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
Oct 2, 2025https://github.com/python/cpython/pull/139234#issuecomment-3363537678
GH-139527https://github.com/python/cpython/pull/139527
3.12 branchhttps://github.com/python/cpython/tree/3.12
Please reload this pagehttps://github.com/python/cpython/pull/139234
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
needs backport to 3.12 https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22needs%20backport%20to%203.12%22
Oct 2, 2025https://github.com/python/cpython/pull/139234#event-20070373839
hartworkhttps://github.com/hartwork
Oct 2, 2025 https://github.com/python/cpython/pull/139234#ref-commit-a295473
https://github.com/picnixz
https://github.com/hartwork
pythongh-90949https://github.com/python/cpython/issues/90949
: add Expat API to prevent XML deadly allocations (https://github.com/hartwork/cpython/commit/a295473f24ea0eacf17dae5485150f2f612ae264
CVE-…https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
a295473https://github.com/hartwork/cpython/commit/a295473f24ea0eacf17dae5485150f2f612ae264
…2025-59375https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
python#139234https://github.com/python/cpython/pull/139234
CVE-2025-59375https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
f04bea4https://github.com/hartwork/cpython/commit/f04bea44c37793561d753dd4ca6e7cd658137553
hartworkhttps://github.com/hartwork
Oct 2, 2025 https://github.com/python/cpython/pull/139234#ref-commit-5680561
https://github.com/picnixz
https://github.com/hartwork
pythongh-90949https://github.com/python/cpython/issues/90949
: amendhttps://github.com/hartwork/cpython/commit/5680561ce633d02b2ae0e486ef574780161ffcdc
pythonGH-139234https://github.com/python/cpython/pull/139234
in prevision of future mitigati…https://github.com/hartwork/cpython/commit/5680561ce633d02b2ae0e486ef574780161ffcdc
5680561https://github.com/hartwork/cpython/commit/5680561ce633d02b2ae0e486ef574780161ffcdc
python#139366https://github.com/python/cpython/pull/139366
f04bea4https://github.com/hartwork/cpython/commit/f04bea44c37793561d753dd4ca6e7cd658137553
68a1778https://github.com/hartwork/cpython/commit/68a1778b7721f3fb853cd3aa674f7039c2a4df36
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
Oct 2, 2025https://github.com/python/cpython/pull/139234#issuecomment-3363611307
GH-139529https://github.com/python/cpython/pull/139529
3.11 branchhttps://github.com/python/cpython/tree/3.11
Please reload this pagehttps://github.com/python/cpython/pull/139234
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
needs backport to 3.11 https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22needs%20backport%20to%203.11%22
Oct 2, 2025https://github.com/python/cpython/pull/139234#event-20070658725
hartworkhttps://github.com/hartwork
Oct 3, 2025 https://github.com/python/cpython/pull/139234#ref-commit-de690f1
https://github.com/picnixz
https://github.com/hartwork
pythongh-90949https://github.com/python/cpython/issues/90949
: add Expat API to prevent XML deadly allocations (https://github.com/hartwork/cpython/commit/de690f1e45672dfbf648695d15d775bf073c5155
CVE-…https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
de690f1https://github.com/hartwork/cpython/commit/de690f1e45672dfbf648695d15d775bf073c5155
…2025-59375https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
python#139234https://github.com/python/cpython/pull/139234
CVE-2025-59375https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
f04bea4https://github.com/hartwork/cpython/commit/f04bea44c37793561d753dd4ca6e7cd658137553
hartworkhttps://github.com/hartwork
Oct 3, 2025 https://github.com/python/cpython/pull/139234#ref-commit-6ae7665
https://github.com/picnixz
https://github.com/hartwork
pythongh-90949https://github.com/python/cpython/issues/90949
: amendhttps://github.com/hartwork/cpython/commit/6ae7665443dca42055ecbe5a9e45bcc3cac8fef2
pythonGH-139234https://github.com/python/cpython/pull/139234
in prevision of future mitigati…https://github.com/hartwork/cpython/commit/6ae7665443dca42055ecbe5a9e45bcc3cac8fef2
6ae7665https://github.com/hartwork/cpython/commit/6ae7665443dca42055ecbe5a9e45bcc3cac8fef2
python#139366https://github.com/python/cpython/pull/139366
f04bea4https://github.com/hartwork/cpython/commit/f04bea44c37793561d753dd4ca6e7cd658137553
68a1778https://github.com/hartwork/cpython/commit/68a1778b7721f3fb853cd3aa674f7039c2a4df36
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
Oct 3, 2025https://github.com/python/cpython/pull/139234#issuecomment-3363726205
GH-139532https://github.com/python/cpython/pull/139532
3.10 branchhttps://github.com/python/cpython/tree/3.10
Please reload this pagehttps://github.com/python/cpython/pull/139234
https://github.com/apps/bedevere-app
bedevere-apphttps://github.com/apps/bedevere-app
needs backport to 3.10 https://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22needs%20backport%20to%203.10%22
Oct 3, 2025https://github.com/python/cpython/pull/139234#event-20071302715
picnixzhttps://github.com/picnixz
Oct 4, 2025 https://github.com/python/cpython/pull/139234#ref-commit-fc48a3c
https://github.com/hartwork
gh-90949https://github.com/python/cpython/issues/90949
: Fix an "unused function" compiler warning introduced inhttps://github.com/python/cpython/commit/fc48a3c9cac5b9e8c6a56ec2294b01a8da9f8dee
GH-…https://github.com/python/cpython/pull/139234
fc48a3chttps://github.com/python/cpython/commit/fc48a3c9cac5b9e8c6a56ec2294b01a8da9f8dee
…139234https://github.com/python/cpython/pull/139234
#139558https://github.com/python/cpython/pull/139558
f04bea4https://github.com/python/cpython/commit/f04bea44c37793561d753dd4ca6e7cd658137553
danigmhttps://github.com/danigm
Oct 7, 2025 https://github.com/python/cpython/pull/139234#ref-commit-1aead6b
https://github.com/hartwork
https://github.com/danigm
pythongh-90949https://github.com/python/cpython/issues/90949
: Fix an "unused function" compiler warning introduced inhttps://github.com/openSUSE-Python/cpython/commit/1aead6be844520fe7ed55b118e3364fe24cdfbbb
1aead6bhttps://github.com/openSUSE-Python/cpython/commit/1aead6be844520fe7ed55b118e3364fe24cdfbbb
pythonGH-139234https://github.com/python/cpython/pull/139234
python#139558https://github.com/python/cpython/pull/139558
f04bea4https://github.com/openSUSE-Python/cpython/commit/f04bea44c37793561d753dd4ca6e7cd658137553
https://github.com/hartwork
hartworkhttps://github.com/hartwork
Oct 9, 2025 https://github.com/python/cpython/pull/139234#ref-pullrequest-3496404197
gh-90949: Recommend hasattr with Expat security methods #139800 https://github.com/python/cpython/pull/139800
picnixzhttps://github.com/picnixz
Nov 2, 2025 https://github.com/python/cpython/pull/139234#ref-commit-bf2865f
https://github.com/picnixz
[3.14]https://github.com/python/cpython/commit/bf2865f80f50d0a9a4ea7082ced6087fa76b6f7c
gh-90949https://github.com/python/cpython/issues/90949
: add Expat API to prevent XML deadly allocations (https://github.com/python/cpython/commit/bf2865f80f50d0a9a4ea7082ced6087fa76b6f7c
CVE…https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
bf2865fhttps://github.com/python/cpython/commit/bf2865f80f50d0a9a4ea7082ced6087fa76b6f7c
…-2025-59375https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
GH-139234https://github.com/python/cpython/pull/139234
#139359https://github.com/python/cpython/pull/139359
gh-90949https://github.com/python/cpython/issues/90949
CVE-2025-59375https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
GH-139234https://github.com/python/cpython/pull/139234
CVE-2025-59375https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
f04bea4https://github.com/python/cpython/commit/f04bea44c37793561d753dd4ca6e7cd658137553
68a1778https://github.com/python/cpython/commit/68a1778b7721f3fb853cd3aa674f7039c2a4df36
picnixzhttps://github.com/picnixz
Nov 2, 2025 https://github.com/python/cpython/pull/139234#ref-commit-bc36bd1
https://github.com/hartwork
[3.13]https://github.com/python/cpython/commit/bc36bd1786b8921546b70d745aef3912af588bbb
gh-90949https://github.com/python/cpython/issues/90949
: add Expat API to prevent XML deadly allocations (https://github.com/python/cpython/commit/bc36bd1786b8921546b70d745aef3912af588bbb
CVE…https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
bc36bd1https://github.com/python/cpython/commit/bc36bd1786b8921546b70d745aef3912af588bbb
…-2025-59375https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
GH-139234https://github.com/python/cpython/pull/139234
#139367https://github.com/python/cpython/pull/139367
gh-90949https://github.com/python/cpython/issues/90949
CVE-2025-59375https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
#139234https://github.com/python/cpython/pull/139234
CVE-2025-59375https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
f04bea4https://github.com/python/cpython/commit/f04bea44c37793561d753dd4ca6e7cd658137553
68a1778https://github.com/python/cpython/commit/68a1778b7721f3fb853cd3aa674f7039c2a4df36
pablogsalhttps://github.com/pablogsal
Nov 25, 2025 https://github.com/python/cpython/pull/139234#ref-commit-1173f80
https://github.com/hartwork
https://github.com/picnixz
[3.10]https://github.com/python/cpython/commit/1173f8068b9a8c1168780532c466c391be10bf67
gh-90949https://github.com/python/cpython/issues/90949
: add Expat API to prevent XML deadly allocations (https://github.com/python/cpython/commit/1173f8068b9a8c1168780532c466c391be10bf67
CVE…https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
1173f80https://github.com/python/cpython/commit/1173f8068b9a8c1168780532c466c391be10bf67
…-2025-59375https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
GH-139234https://github.com/python/cpython/pull/139234
#139532https://github.com/python/cpython/pull/139532
pablogsalhttps://github.com/pablogsal
Nov 25, 2025 https://github.com/python/cpython/pull/139234#ref-commit-9bbb68a
https://github.com/hartwork
https://github.com/picnixz
[3.11]https://github.com/python/cpython/commit/9bbb68a52456655f15953ff0e2ee4e2bdbf78c1e
gh-90949https://github.com/python/cpython/issues/90949
: add Expat API to prevent XML deadly allocations (https://github.com/python/cpython/commit/9bbb68a52456655f15953ff0e2ee4e2bdbf78c1e
CVE…https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
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Add c-analyzer fails for pyexpat.c #142025 https://github.com/python/cpython/issues/142025
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: add Expat API to prevent XML deadly allocations (https://github.com/python/cpython/commit/0e4cd897811651d896c5be9beec803b506131c7c
CVE…https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
0e4cd89https://github.com/python/cpython/commit/0e4cd897811651d896c5be9beec803b506131c7c
…-2025-59375https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
GH-139234https://github.com/python/cpython/pull/139234
#139527https://github.com/python/cpython/pull/139527
gh-90949https://github.com/python/cpython/issues/90949
CVE-2025-59375https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
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CVE-2025-59375https://github.com/advisories/GHSA-vjqp-pjp6-xcxx
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