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GeezerVison is showing github.com — [3.10] gh-149018: Use `XML_SetHashSalt16Bytes` in `pyexpat`/`_elementtree` when possible (GH-149023) by StanFromIreland · Pull Request #155611 · python/cpython

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@StanFromIreland

@StanFromIreland StanFromIreland commented Aug 12, 2026 •
edited by bedevere-app Bot
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(cherry picked from commit 24b8f12)

  • Issue: [CVE-2026-7210] Insufficient entropy in pyexpat with protection against hash flooding #149018

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@StanFromIreland
[3.10] pythongh-149018: Use XML_SetHashSalt16Bytes in pyexpat/`_e…
056585b 
…lementtree` when possible (pythonGH-149023) (pythonGH-155345)

(cherry picked from commit e37df2a)
(cherry picked from commit 95cf26d)

Co-authored-by: Stan Ulbrych <[email protected]>
(cherry picked from commit fc9b11f)
(cherry picked from commit 24b8f12)
@StanFromIreland StanFromIreland assigned pablogsal Aug 12, 2026
@StanFromIreland
StanFromIreland requested a review from tiran as a code owner August 12, 2026 11:04
@bedevere-app bedevere-app Bot mentioned this pull request Aug 12, 2026
[CVE-2026-7210] Insufficient entropy in pyexpat with protection against hash flooding #149018
Closed
@bedevere-app bedevere-app Bot added the awaiting core review label Aug 12, 2026
@bedevere-app bedevere-app Bot mentioned this pull request Aug 12, 2026
gh-149018: Use XML_SetHashSalt16Bytes in pyexpat/_elementtree when possible #149023
Merged
@StanFromIreland
Fix SetHashSalt16Bytes assignment in pyexpat.c
bc77688
@pablogsal
pablogsal merged commit ea70712 into python:3.10 Aug 13, 2026
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@bedevere-app bedevere-app Bot removed the awaiting core review label Aug 13, 2026
@StanFromIreland
StanFromIreland deleted the backport-95cf26d-3.10 branch August 13, 2026 09:14
icanhasmath pushed a commit to ActiveState/cpython that referenced this pull request Oct 28, 2026
@StanFromIreland @icanhasmath
[3.10] pythongh-149018: Use XML_SetHashSalt16Bytes in pyexpat/`_e…
7eda8df 
…lementtree` when possible (pythonGH-149023) (python#155611)

* [3.10] pythongh-149018: Use `XML_SetHashSalt16Bytes` in `pyexpat`/`_elementtree` when possible (pythonGH-149023) (pythonGH-155345)
(cherry picked from commit e37df2a)
(cherry picked from commit 95cf26d)

Co-authored-by: Stan Ulbrych <[email protected]>
(cherry picked from commit fc9b11f)
(cherry picked from commit 24b8f12)

* Fix SetHashSalt16Bytes assignment in pyexpat.c

(cherry picked from commit ea70712)

3.9.25.x: 3.9 never received pythongh-90949 (the Expat allocation-tracker /
billion-laughs tuning API), so the PyExpat_CAPI capsule gains only the
SetHashSalt16Bytes slot, appended after SetReparseDeferralEnabled.
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@tiran tiran Awaiting requested review from tiran

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2 participants

@StanFromIreland @pablogsal
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