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

Solution

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Workaround

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History

Wed, 21 Jan 2026 20:30:00 +0900

Type Values Removed Values Added
First Time appeared Python
Python cpython
Vendors & Products Python
Python cpython

Wed, 21 Jan 2026 07:45:00 +0900


Wed, 21 Jan 2026 06:45:00 +0900

Type Values Removed Values Added
Description User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.
Title Header injection via newlines in data URL mediatype
Weaknesses CWE-93
References
Metrics cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:L/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: PSF

Published:

Updated: 2026-01-21T16:14:47.449Z

Reserved: 2025-12-29T21:04:54.816Z

Link: CVE-2025-15282

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-01-20T22:15:50.883

Modified: 2026-01-20T23:16:05.233

Link: CVE-2025-15282

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-21T20:18:37Z

Weaknesses