CVE-2025-15282CWE-93

Header injection via newlines in data URL mediatype

Medium · published January 20, 2026

CVSS v4.0
6.0
EPSS
1%
Percentile
44.5
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v4.0
6.0 · MEDIUM
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
EPSS
0.00537 · 44.5th percentile
Weakness
CWE-93 · Improper Neutralization of CRLF Sequences ('CRLF Injection')
Published
2026-01-20T21:35Z
EPSS history
Timeline
  • 20 JAN 21:35Z
    Header injection via newlines in data URL mediatype
    cvelistv5