python-django: An issue was discovered in 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30
CVE-2026-3902 is fixed in 3 products on 1 platform, first by DEBIAN-CVE-2026-3902, released April 7, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| python-Django · opensuse-leap 16.0 | 5.2.4-bp160.7.1 | OPENSUSE-SU-2026:20578-1 | Apr 13, 2026 |
| python-django · Debian 14 | 3:4.2.30-1 | DEBIAN-CVE-2026-3902 | Apr 7, 2026 |
| python3-django · Ubuntu 22.04.1 LTS (jammy) | 2:3.2.12-2ubuntu1.26 | python3-django 2:3.2.12-2ubuntu1.26 | Apr 15, 2026 |
| python3-django · Ubuntu 24.04.5 LTS (noble) | 3:4.2.11-1ubuntu1.15 | python3-django 3:4.2.11-1ubuntu1.15 | Apr 15, 2026 |
| python3-django · Ubuntu 25.10 (questing) | 3:5.2.4-1ubuntu2.4 | python3-django 3:5.2.4-1ubuntu2.4 | Apr 15, 2026 |
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