CVE-2026-4277Network attack vector

Unauthorized inline object creation via forged POST

Published Apr 7, 2026 · Updated Apr 7, 2026

Missing authorization in Django 4.2 before 4.2.30, 5.2 before 5.2.13, and 6.0 before 6.0.4 allows remote authenticated users to add inline objects. GenericInlineModelAdmin.get_formset() accepted forged POST formset entries because its model form did not suppress newly added instances when has_add_permission() was false. A staff user with access to the parent admin model but no add permission for the configured generic inline model can create related records.

CVSS severity9.8
Critical
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Django 4.2 before 4.2.30, 5.2 before 5.2.13, and 6.0 before 6.0.4 allows remote authenticated users to add inline objects. GenericInlineModelAdmin.get_formset() accepted forged POST formset entries because its model form did not suppress newly added instances when has_add_permission() was false. A staff user with access to the parent admin model but no add permission for the configured generic inline model can create related records.

The record

CVE
CVE-2026-4277
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
Django Software Foundation
Product
Django
Classifications
CWE-862
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.2 <4.2.30
  2. Affected versionversion=5.2 <5.2.13
  3. Affected versionversion=6.0 <6.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Django Software Foundation · Djangoversion=4.2 <4.2.30; version=5.2 <5.2.13; version=6.0 <6.0.4

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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