CVE-2025-14550

Potential denial-of-service vulnerability via repeated headers when using ASGI

Published Feb 3, 2026 CVSS 3.1 · 7.5 High EPSS 1.1% KEV · Not listed
Description
An issue was discovered in 6.0 before 6.0.2, 5.2 before 5.2.11, and 4.2 before 4.2.28.
`ASGIRequest` allows a remote attacker to cause a potential denial-of-service via a crafted request with multiple duplicate headers.
Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.
Django would like to thank Jiyong Yang for reporting this issue.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-6150-1 python-django security update
Github GHSA Github GHSA GHSA-33mw-q7rj-mjwj Django has Inefficient Algorithmic Complexity
Ubuntu USN Ubuntu USN USN-8009-1 Django vulnerabilities
History
Type Values Removed Values Added
CPEs cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Djangoproject
Djangoproject django
Vendors & Products Djangoproject
Djangoproject django
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description An issue was discovered in 6.0 before 6.0.2, 5.2 before 5.2.11, and 4.2 before 4.2.28. `ASGIRequest` allows a remote attacker to cause a potential denial-of-service via a crafted request with multiple duplicate headers. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank Jiyong Yang for reporting this issue.
Title Potential denial-of-service vulnerability via repeated headers when using ASGI
Weaknesses CWE-407
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
DSF
Published
Updated
Feb 3, 2026, 4:27 PM
Reserved
Dec 11, 2025, 8:08 PM
Status
Analyzed
Published
Feb 3, 2026, 3:16 PM
Modified
Jun 17, 2026, 8:36 AM
Severity
Moderate
Public date
Feb 3, 2026, 2:38 PM