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[3.14] gh-143925: Reject control characters in data: URL mediatypes #144084

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[3.14] gh-143925: Reject control characters in data: URL mediatypes #144084

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@miss-islington miss-islington commented Jan 20, 2026 •
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(cherry picked from commit f25509e)

Co-authored-by: Seth Michael Larson seth@python.org

@sethmlarson @miss-islington
pythongh-143925: Reject control characters in data: URL mediatypes
2c5ac36 
(cherry picked from commit f25509e)

Co-authored-by: Seth Michael Larson <seth@python.org>
@bedevere-app bedevere-app bot mentioned this pull request Jan 20, 2026
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@sethmlarson sethmlarson added the type-security A security issue label Jan 21, 2026
@sethmlarson sethmlarson requested a review from hugovk January 21, 2026 15:25
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