CVE-2026-5766

An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14. ASGI requests with a missing or understated `Content-Length` header can bypass the `FILE_UPLOAD_MAX_MEMORY_SIZE` limit, potentially loading large files into memory and causing service degradation. As a reminder, Django expects a limit to be configured at the web server level rather than solely relying on `FILE_UPLOAD_MAX_MEMORY_SIZE`. 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 Kyle Agronick for reporting this issue.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://docs.djangoproject.com/en/dev/releases/security/	Vendor Advisory
https://groups.google.com/g/django-announce	Third Party Advisory
https://www.djangoproject.com/weblog/2026/may/05/security-releases/	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:djangoproject:django::::::::
	cpe:2.3:a:djangoproject:django::::::::

History

No history.

Information

Published : 2026-05-05 16:16

Updated : 2026-06-17 10:59

NVD link : CVE-2026-5766

Mitre link : CVE-2026-5766

CVE.ORG link : CVE-2026-5766

JSON object : View

Products Affected

djangoproject

django

CWE

CWE-130

Improper Handling of Length Parameter Inconsistency

{"id": "CVE-2026-5766", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5766", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-05T17:03:20.935294Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.3, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "affectedData": [{"repo": "https://github.com/django/django/", "vendor": "djangoproject", "product": "Django", "versions": [{"status": "affected", "version": "6.0", "lessThan": "6.0.5", "versionType": "python"}, {"status": "unaffected", "version": "6.0.5", "versionType": "python"}, {"status": "affected", "version": "5.2", "lessThan": "5.2.14", "versionType": "python"}, {"status": "unaffected", "version": "5.2.14", "versionType": "python"}], "packageName": "django", "collectionURL": "https://pypi.org/project/Django/", "defaultStatus": "unaffected"}]}], "published": "2026-05-05T16:16:17.740", "references": [{"url": "https://docs.djangoproject.com/en/dev/releases/security/", "tags": ["Vendor Advisory"], "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92"}, {"url": "https://groups.google.com/g/django-announce", "tags": ["Third Party Advisory"], "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92"}, {"url": "https://www.djangoproject.com/weblog/2026/may/05/security-releases/", "tags": ["Vendor Advisory"], "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "description": [{"lang": "en", "value": "CWE-130"}]}], "descriptions": [{"lang": "en", "value": "An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14.\nASGI requests with a missing or understated `Content-Length` header can bypass the `FILE_UPLOAD_MAX_MEMORY_SIZE` limit, potentially loading large files into memory and causing service degradation.\r\n \r\nAs a reminder, Django expects a limit to be configured at the web server level rather than solely relying on `FILE_UPLOAD_MAX_MEMORY_SIZE`.\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 Kyle Agronick for reporting this issue."}], "lastModified": "2026-06-17T10:59:36.887", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5AD5B44B-7569-458C-8F44-3021D9CC577C", "versionEndExcluding": "5.2.14", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "30ADB5F4-66B5-4015-BB55-CCB31106AB95", "versionEndExcluding": "6.0.5", "versionStartIncluding": "6.0"}], "operator": "OR"}]}], "sourceIdentifier": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92"}