`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.
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-mvfq-ggxm-9mc5 | Django vulnerable to ASGI header spoofing via underscore/hyphen conflation |
Ubuntu USN |
USN-8154-1 | Django vulnerabilities |
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Wed, 08 Apr 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Djangoproject
Djangoproject django |
|
| Vendors & Products |
Djangoproject
Djangoproject django |
Wed, 08 Apr 2026 00:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-444 | |
| References |
| |
| Metrics |
threat_severity
|
threat_severity
|
Tue, 07 Apr 2026 18:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
cvssV3_1
|
Tue, 07 Apr 2026 15:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | ASGI header spoofing via underscore/hyphen conflation | |
| Weaknesses | CWE-290 | |
| References |
|
Projects
Sign in to view the affected projects.
Status: PUBLISHED
Assigner: DSF
Published:
Updated: 2026-04-07T16:14:07.198Z
Reserved: 2026-03-10T18:33:26.472Z
Link: CVE-2026-3902
Updated: 2026-04-07T16:13:58.332Z
Status : Awaiting Analysis
Published: 2026-04-07T15:17:46.353
Modified: 2026-04-08T21:27:00.663
Link: CVE-2026-3902
OpenCVE Enrichment
Updated: 2026-04-08T19:49:06Z
Github GHSA
Ubuntu USN