CVE-2026-3902

HIGH

7.5

Description

An issue was discovered in 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30. `ASGIRequest` allows a remote attacker to spoof headers by exploiting an ambiguous mapping of two header variants (with hyphens or with underscores) to a single version with underscores. 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 Tarek Nakkouch for reporting this issue.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/7/2026

Last Modified4/7/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-290

References

https://docs.djangoproject.com/en/dev/releases/security/(6a34fbeb-21d4-45e7-8e0a-62b95bc12c92)

https://groups.google.com/g/django-announce(6a34fbeb-21d4-45e7-8e0a-62b95bc12c92)

https://www.djangoproject.com/weblog/2026/apr/07/security-releases/(6a34fbeb-21d4-45e7-8e0a-62b95bc12c92)

IOC Correlations

No correlations recorded

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