High severity7.5NVD Advisory· Published Apr 7, 2026· Updated Apr 13, 2026
CVE-2026-3902
CVE-2026-3902
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 packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
DjangoPyPI | >= 6.0, < 6.0.4 | 6.0.4 |
DjangoPyPI | >= 5.2, < 5.2.13 | 5.2.13 |
DjangoPyPI | >= 4.2, < 4.2.30 | 4.2.30 |
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
7- docs.djangoproject.com/en/dev/releases/security/nvdPatchVendor Advisory
- www.djangoproject.com/weblog/2026/apr/07/security-releases/nvdPatchVendor Advisory
- github.com/advisories/GHSA-mvfq-ggxm-9mc5ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-3902ghsaADVISORY
- docs.djangoproject.com/en/dev/releases/securityghsaWEB
- groups.google.com/g/django-announcenvdRelease NotesWEB
- www.djangoproject.com/weblog/2026/apr/07/security-releasesghsaWEB
News mentions
1- How AI Assistants are Moving the Security GoalpostsKrebs on Security · Mar 8, 2026