CVE-2026-3902 Affecting py3-django package, versions <5.2.13-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.44% (35th percentile)

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  • Snyk IDSNYK-ALPINE324-PY3DJANGO-17302835
  • published11 Jun 2026
  • disclosed7 Apr 2026

Introduced: 7 Apr 2026

CVE-2026-3902  (opens in a new tab)

How to fix?

Upgrade Alpine:3.24 py3-django to version 5.2.13-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream py3-django package and not the py3-django package as distributed by Alpine. See How to fix? for Alpine:3.24 relevant fixed versions and status.

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 Base Scores

version 3.1