CVE-2026-3902

Published: Apr 7, 2026Modified: Jun 17, 2026

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

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.

Affected (3)

Products: Djangoproject: Django

1 product

Configuration A

3 vulnerable

Vulnerable Software	Affected Versions
Djangoproject Django	From 4.2 to 4.2.30
Djangoproject Django	From 5.2 to 5.2.13
Djangoproject Django	From 6.0 to 6.0.4

Related CWEs

Authentication Bypass by Spoofing

This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

References (3)

https://docs.djangoproject.com/en/dev/releases/security/

Source: 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92

PatchVendor Advisory

https://groups.google.com/g/django-announce

Source: 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92

Release Notes

https://www.djangoproject.com/weblog/2026/apr/07/security-releases/

Source: 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92

PatchVendor Advisory

Timeline

No history available yet.