CVE-2025-14550

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

HIGH
7.5
CVSS Score
Published: February 3, 2026 at 02:38 PM UTC
Updated: June 17, 2026 at 08:36 AM UTC
2 products affected across 1 vendorDjangoAsgiref

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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

4.2 ≤ v < 4.2.285.2 ≤ v < 5.2.116.0 ≤ v < 6.0.24.25.26.0
Vendor states this is fixed in 4.2.28 (unaffected)
Vendor states this is fixed in 5.2.11 (unaffected)
Vendor states this is fixed in 6.0.2 (unaffected)
3 ≤ v < 3.11.13
Vendor states this is fixed in 3.11.1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

Mailing ListRelease Notes
Source: cverecord
https://groups.google.com/g/django-announce

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-407

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