Potential memory exhaustion in MultiPartParser via base64-encoded file upload

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-108147
StatePUBLISHED
AssignerDSF
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-03 16:17:18 UTC
Updated2026-11-03 19:17:47 UTC
DescriptionAn issue was discovered in Django 6.1 before 6.1.3, 6.0.4 before 6.0.10, and 5.2.13 before 5.2.19. `django.http.multipartparser.MultiPartParser` is subject to excessive memory consumption when processing multipart file uploads with base64 `Content-Transfer-Encoding`, which could be buffered entirely in memory before being passed to upload handlers. Earlier, unsupported Django series (such as 5.1.x, 5.0.x, and 4.2.x) were not evaluated and may also be affected. Django would like to thank Ignacy Kujawa for reporting this issue.

Risk And Classification

Primary CVSS: v4.0 6.9 MEDIUM from 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92

CVSS:4.0/AV:N/AC:L/AT:N/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

Problem Types: CWE-770 | CWE-770 CWE-770: Allocation of Resources Without Limits or Throttling

VersionSourceTypeScoreSeverityVector
4.06a34fbeb-21d4-45e7-8e0a-62b95bc12c92Secondary6.9MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/C...
4.0CNADECLARED6.9MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
3.16a34fbeb-21d4-45e7-8e0a-62b95bc12c92Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:N/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

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Djangoproject Django affected 6.1 6.1.3 python Not specified
CNA Djangoproject Django unaffected 6.1.3 python Not specified
CNA Djangoproject Django unaffected 6.0 6.0.4 python Not specified
CNA Djangoproject Django affected 6.0.4 6.0.10 python Not specified
CNA Djangoproject Django unaffected 6.0.10 python Not specified
CNA Djangoproject Django unaffected 5.2 5.2.13 python Not specified
CNA Djangoproject Django affected 5.2.13 5.2.19 python Not specified
CNA Djangoproject Django unaffected 5.2.19 python Not specified

References

ReferenceSourceLinkTags
github.com/django/django/commit/8b435411f11d69a0dd41a8837654323502e6058e 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92 github.com
groups.google.com/g/django-announce 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92 groups.google.com
docs.djangoproject.com/en/dev/releases/security 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92 docs.djangoproject.com
github.com/django/django/commit/4bd1f59a80adafddbd47527c66d92d6a224244d8 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92 github.com
github.com/django/django/commit/5d95d9236fa4ededfb1931c60a65432385ece85f 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92 github.com
www.djangoproject.com/weblog/2026/nov/03/security-releases 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92 www.djangoproject.com
github.com/django/django/commit/a29ee4a55acedbe7ba0cb4d2db28c4e4d2848e02 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92 github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Ignacy Kujawa (en)

CNA: Jake Howard (en)

CNA: Natalia Bidart (en)

CNA: Natalia Bidart (en)

CNA: Jake Howard (en)

CNA: Jacob Walls (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-09-07T12:00:00.000ZInitial report received.
CNA2026-10-15T00:00:00.000ZVulnerability confirmed.
CNA2026-11-03T09:30:00.000ZSecurity release issued.

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