CVE-2026-3902

HIGH EPSS 34.9%
Published Apr 7, 20262mo ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published Apr 7, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
34.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-290

Affected Products 3

VendorProductVersionRange
djangoprojectdjango*≥4.2  –  <4.2.30
djangoprojectdjango*≥5.2  –  <5.2.13
djangoprojectdjango*≥6.0  –  <6.0.4

References 3

  • docs.djangoproject.com https://docs.djangoproject.com/en/dev/releases/security/
    PatchVendor Advisory
  • groups.google.com https://groups.google.com/g/django-announce
    Release Notes
  • djangoproject.com https://www.djangoproject.com/weblog/2026/apr/07/security-releases/
    PatchVendor Advisory

Remediation

  • docs.djangoproject.com https://docs.djangoproject.com/en/dev/releases/security/
    PatchVendor Advisory
  • djangoproject.com https://www.djangoproject.com/weblog/2026/apr/07/security-releases/
    PatchVendor Advisory