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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
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
13- osv-coords12 versionspkg:apk/chainguard/authentik-2025.12pkg:apk/chainguard/authentik-2026.2pkg:apk/chainguard/authentik-fips-2025.12pkg:apk/chainguard/authentik-fips-2026.2pkg:apk/chainguard/awxpkg:apk/chainguard/label-studiopkg:bitnami/djangopkg:pypi/djangopkg:rpm/opensuse/python-Django4&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/python-Django6&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/python-Django&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/python-Django&distro=openSUSE%20Tumbleweed
< 2025.12.4-r3+ 11 more
- (no CPE)range: < 2025.12.4-r3
- (no CPE)range: < 2026.2.1-r3
- (no CPE)range: < 2025.12.4-r3
- (no CPE)range: < 2026.2.1-r3
- (no CPE)range: < 24.6.1-r34
- (no CPE)range: < 1.23.0-r3
- (no CPE)range: >= 4.2.0, < 4.2.30
- (no CPE)range: >= 6.0, < 6.0.4
- (no CPE)range: < 4.2.30-1.1
- (no CPE)range: < 6.0.4-1.1
- (no CPE)range: < 5.2.4-bp160.7.1
- (no CPE)range: < 5.2.13-1.1
Patches
Vulnerability mechanics
References
8- 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
- github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-51.yamlghsaWEB
- groups.google.com/g/django-announcenvdRelease NotesWEB
- www.djangoproject.com/weblog/2026/apr/07/security-releasesghsaWEB
News mentions
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