← CVE Intelligence

CVE-2026-3902

ASGI header spoofing via underscore/hyphen conflation PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
djangoproject / Djangoaffected 6.0 before 6.0.4; unaffected 6.0.4; affected 5.2 before 5.2.13; unaffected 5.2.13; affected 4.2 before 4.2.30; unaffected 4.2.30

CWE

CWE-290

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.