CVE-2025-15282 MEDIUM

CVE-2025-15282: Header injection via newlines in data URL mediatype

Vendor Python Software Foundation
Product CPython
Weakness CWE-93 · CRLF injection
Published January 20, 2026
Last update March 3, 2026
View on NVD All CVEs

CVSS base score

6.0/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

January 20, 2026 CVE published
March 3, 2026 Record updated