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6.0 Medium

CVE-2025-15282 User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data…

Description

User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.

Affected products and versions

Product Affected versions Fixed in
CPython 3.15 3.15.0a1 → < 3.15.0a6 3.15.0a6
CPython 3.14 3.14.0 → < 3.14.3 3.14.3
CPython 3.13 3.13.0 → < 3.13.12 3.13.12
CPython 3.12 3.12.0 → < 3.12.13 3.12.13
CPython 3.11 3.11.0 → < 3.11.15 3.11.15
CPython 3.10 earliest → < 3.10.20 3.10.20

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