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CVE-2025-15282

Header injection via newlines in data URL mediatype

Published: Jan 20, 2026Updated: Jan 26, 2026 Sources: CVE List NVD BDUCWE-93
NVD MITRE
7.7CVSSHIGH
EPSS Score
0.5%
Top 62.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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

CVSS Vector Breakdown

AV:NAC:LC:NI:HA:N
Exploitability
AV:NAccess Vector
Network
AC:LAccess Complexity
Low
Impact
C:NConfidentiality
None
I:HIntegrity
H
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-93

Affected Products

CPythonPython Software FoundationOSS Libraries
Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
PythonPython Software FoundationOSS Libraries
python software foundationoss-projectUSOSS Librariesaka python software foundation, psf
red hat inc.commercialUSOperating Systemsaka red hat
ооо «ред софт»commercialRUOperating Systemsaka red soft
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
and 3 more affected products View all →

Exploitability

Official Patch Available

References

https://github.com/python/cpython/commit/05356b1cc153108aaf27f3b72ce438af4aa218c0
github.com
https://github.com/python/cpython/commit/34d76b00dabde81a793bd06dd8ecb057838c4b38
github.com
https://github.com/python/cpython/commit/3f396ca9d7bbe2a50ea6b8c9b27c0082884d9f80
github.com
and 11 more references View all →

Timeline

Published
Jan 20, 2026
Last Updated
Jan 26, 2026

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