Vulnerability advisory
BIT-django-2026-3902
ASGI header spoofing via underscore/hyphen conflation
Also known as CVE-2026-3902GHSA-mvfq-ggxm-9mc5PYSEC-2026-51
Severity
Severity not reported.
Affected versions
django Bitnami
| Affected | Fixed in |
|---|---|
4.2.0 to before 4.2.30 | 4.2.30 |
5.2.0 to before 5.2.13 | 5.2.13 |
6.0.0 to before 6.0.4 | 6.0.4 |
Severity for this package
| |
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.