Vulnerability Details CVE-2026-3902
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 14.6%
CVSS Severity
CVSS v3 Score 7.5
References
Products affected by CVE-2026-3902
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cpe:2.3:a:djangoproject:django:4.2
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cpe:2.3:a:djangoproject:django:4.2.0
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cpe:2.3:a:djangoproject:django:4.2.1
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cpe:2.3:a:djangoproject:django:4.2.10
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cpe:2.3:a:djangoproject:django:4.2.11
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cpe:2.3:a:djangoproject:django:4.2.12
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cpe:2.3:a:djangoproject:django:4.2.13
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cpe:2.3:a:djangoproject:django:4.2.14
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cpe:2.3:a:djangoproject:django:4.2.15
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cpe:2.3:a:djangoproject:django:4.2.16
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cpe:2.3:a:djangoproject:django:4.2.17
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cpe:2.3:a:djangoproject:django:4.2.18
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cpe:2.3:a:djangoproject:django:4.2.19
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cpe:2.3:a:djangoproject:django:4.2.2
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cpe:2.3:a:djangoproject:django:4.2.20
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cpe:2.3:a:djangoproject:django:4.2.21
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cpe:2.3:a:djangoproject:django:4.2.22
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cpe:2.3:a:djangoproject:django:4.2.23
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cpe:2.3:a:djangoproject:django:4.2.24
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cpe:2.3:a:djangoproject:django:4.2.25
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cpe:2.3:a:djangoproject:django:4.2.26
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cpe:2.3:a:djangoproject:django:4.2.28
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cpe:2.3:a:djangoproject:django:4.2.3
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cpe:2.3:a:djangoproject:django:4.2.4
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cpe:2.3:a:djangoproject:django:4.2.5
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cpe:2.3:a:djangoproject:django:4.2.6
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cpe:2.3:a:djangoproject:django:4.2.7
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cpe:2.3:a:djangoproject:django:4.2.8
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cpe:2.3:a:djangoproject:django:4.2.9
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cpe:2.3:a:djangoproject:django:5.2
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cpe:2.3:a:djangoproject:django:5.2.1
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cpe:2.3:a:djangoproject:django:5.2.10
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cpe:2.3:a:djangoproject:django:5.2.11
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cpe:2.3:a:djangoproject:django:5.2.2
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cpe:2.3:a:djangoproject:django:5.2.3
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cpe:2.3:a:djangoproject:django:5.2.4
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cpe:2.3:a:djangoproject:django:5.2.5
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cpe:2.3:a:djangoproject:django:5.2.6
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cpe:2.3:a:djangoproject:django:5.2.7
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cpe:2.3:a:djangoproject:django:5.2.8
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cpe:2.3:a:djangoproject:django:6.0
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cpe:2.3:a:djangoproject:django:6.0.1
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cpe:2.3:a:djangoproject:django:6.0.2