CVE-2025-15282 Details
Description
User-controlled data URLs parsed by urllib.request.DataHandler allow injecting headers through newlines in the data URL mediatype.
A vulnerability exists in the Python standard library's urllib module, specifically within the DataHandler component. This issue allows for header injection by exploiting user-controlled data URLs. The vulnerability arises from the improper handling of control characters in the data URL mediatype, which can be used to inject newlines and manipulate header parsing.
Users should update to the latest version of Python where this vulnerability has been addressed. Instructions for updating Python can be found on the official Python website.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jan 20, 2026CISA-ADP
Assessed Jan 21, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-93 | Improper Neutralization of CRLF Sequences ('CRLF Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Python CPython | All versions |
CPE
Remediation
| |
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jan 26, 2026 | CVE Modified | [email protected] |
| Jan 23, 2026 | CVE Modified | [email protected] |
| Jan 20, 2026 | CVE Modified | [email protected] |
| Jan 20, 2026 | New CVE Received | [email protected] |