CVE-2025-15282

EUVD-2025-206305
User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.
CRLF Injection
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
UNKNOWN
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Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 13%
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://github.com/python/cpython/commit/05356b1cc153108aaf27f3b72ce438af4aa218c0
https://github.com/python/cpython/commit/34d76b00dabde81a793bd06dd8ecb057838c4b38
https://github.com/python/cpython/commit/3f396ca9d7bbe2a50ea6b8c9b27c0082884d9f80
https://github.com/python/cpython/commit/4ed11d3cd288e6b90196a15c5a825a45d318fe47
https://github.com/python/cpython/commit/a35ca3be5842505dab74dc0b90b89cde0405017a
https://github.com/python/cpython/commit/f25509e78e8be6ea73c811ac2b8c928c28841b9f
https://github.com/python/cpython/issues/143925
https://github.com/python/cpython/pull/143926
https://mail.python.org/archives/list/security-announce@python.org/thread/X66HL7SISGJT33J53OHXMZT4DFLMHVKF/