Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2025-15282

Improper Neutralization of CRLF Sequences ('CRLF Injection')

Published: Jan 20, 2026 | Modified: Apr 15, 2026
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
RedHat/V2
RedHat/V3
4.8 MODERATE
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2025-15282
CWEhttps://cwe.mitre.org/data/definitions/93.html

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

Weakness

The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.

Affected Software

NameVendorStart VersionEnd Version
Red Hat Enterprise Linux 10RedHatpython3.12-0:3.12.13-2.el10_2*
Red Hat Enterprise Linux 8RedHatpython3.12-0:3.12.13-2.el8_10*
Red Hat Enterprise Linux 9RedHatpython3.12-0:3.12.13-2.el9_8*
Red Hat Hardened ImagesRedHatpython3-13-main-3.13.13-1.hum1*
Red Hat Hardened ImagesRedHatpython3-14-main-3.14.4-1.hum1*
Red Hat Hardened ImagesRedHatpython3-11-main-3.11.15-4.hum1*
Red Hat Hardened ImagesRedHatpython3-12-main-3.12.13-3.hum1*
Red Hat Update Infrastructure 5RedHatrhui5/installer-rhel9:1779798165*
Red Hat Update Infrastructure 5RedHatrhui5/rhua-rhel9:1779798222*
Python2.7Ubuntuesm-apps/focal*
Python2.7Ubuntuesm-apps/jammy*
Python2.7Ubuntuesm-infra-legacy/trusty*
Python2.7Ubuntuesm-infra-legacy/xenial*
Python2.7Ubuntuesm-infra/bionic*
Python2.7Ubuntuesm-infra/xenial*
Python2.7Ubuntujammy*
Python3.10Ubuntujammy*
Python3.11Ubuntuesm-apps/jammy*
Python3.11Ubuntujammy*
Python3.12Ubuntunoble*
Python3.13Ubuntuquesting*
Python3.13Ubuntuupstream*
Python3.14Ubuntuquesting*
Python3.4Ubuntuesm-infra-legacy/trusty*
Python3.5Ubuntuesm-infra-legacy/trusty*
Python3.5Ubuntuesm-infra-legacy/xenial*
Python3.5Ubuntuesm-infra/xenial*
Python3.6Ubuntuesm-infra/bionic*
Python3.7Ubuntuesm-apps/bionic*
Python3.8Ubuntuesm-apps/bionic*
Python3.8Ubuntuesm-infra/focal*
Python3.9Ubuntuesm-apps/focal*

Potential Mitigations

References

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