HOMEVULNERABILITIESCVE-2026-3902
HIGH

CVE-2026-3902

CWE-290Published: April 7, 2026· Updated: Apr 13, 2026

7.5
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:10.7th

Official 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.

NVD Source

Technical Analysis

CVE-2026-3902 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

djangoproject1 product
django
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://docs.djangoproject.com/en/dev/releases/security/
PATCHhttps://www.djangoproject.com/weblog/2026/apr/07/security-releases/

All References (3)

→
https://docs.djangoproject.com/en/dev/releases/security/Patch · Vendor Advisory
→
https://groups.google.com/g/django-announceRelease Notes
→
https://www.djangoproject.com/weblog/2026/apr/07/security-releases/Patch · Vendor Advisory

Quick Facts

CVE IDCVE-2026-3902
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-290
CISA KEVNo
EPSS (30d)0.04%
Affected1 vendor
PublishedApr 7, 2026

Related CVEs (CWE-290)

CVE-2026-39858
10.0
CVE-2026-6213
10.0
CVE-2021-47923
9.8
CVE-2018-25317
9.8
CVE-2026-25660
9.8
CVE-2026-49468
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-3902 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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