Vulnerability-Lookup

ubuntu-cve-2026-5766

Vulnerability from osv_ubuntu

Published

2026-05-05 14:00

Modified

2026-05-20 15:24

Summary

Details

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.

Severity

5.3 (Medium)


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

6.3 (Medium)


                    
                      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

N/A (UNKNOWN)

low

References

URL

Type

	https://ubuntu.com/security/CVE-2026-5766	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-5766	REPORT
	https://www.djangoproject.com/weblog/2026/may/05/…	REPORT
	https://ubuntu.com/security/notices/USN-8232-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "python-django",
            "binary_version": "1.6.11-0ubuntu1.3+esm11"
          }
        ],
        "priority_reason": "Django developers have rated this to be a low-severity issue"
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "python-django",
        "purl": "pkg:deb/ubuntu/python-django@1.6.11-0ubuntu1.3+esm11?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
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        "1.6-1",
        "1.6.1-1",
        "1.6.1-2",
        "1.6.1-2ubuntu0.1",
        "1.6.1-2ubuntu0.2",
        "1.6.1-2ubuntu0.3",
        "1.6.1-2ubuntu0.4",
        "1.6.1-2ubuntu0.5",
        "1.6.1-2ubuntu0.6",
        "1.6.1-2ubuntu0.8",
        "1.6.1-2ubuntu0.9",
        "1.6.1-2ubuntu0.10",
        "1.6.1-2ubuntu0.11",
        "1.6.1-2ubuntu0.12",
        "1.6.1-2ubuntu0.13",
        "1.6.1-2ubuntu0.14",
        "1.6.1-2ubuntu0.15",
        "1.6.1-2ubuntu0.16",
        "1.6.11-0ubuntu1",
        "1.6.11-0ubuntu1.1",
        "1.6.11-0ubuntu1.2",
        "1.6.11-0ubuntu1.3",
        "1.6.11-0ubuntu1.3+esm1",
        "1.6.11-0ubuntu1.3+esm2",
        "1.6.11-0ubuntu1.3+esm3",
        "1.6.11-0ubuntu1.3+esm4",
        "1.6.11-0ubuntu1.3+esm5",
        "1.6.11-0ubuntu1.3+esm6",
        "1.6.11-0ubuntu1.3+esm7",
        "1.6.11-0ubuntu1.3+esm8",
        "1.6.11-0ubuntu1.3+esm9",
        "1.6.11-0ubuntu1.3+esm10",
        "1.6.11-0ubuntu1.3+esm11"
      ]
    },
    {
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          {
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          },
          {
            "binary_name": "python-django-common",
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          {
            "binary_name": "python3-django",
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        "1.8.7-1ubuntu5",
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        "1.8.7-1ubuntu5.2",
        "1.8.7-1ubuntu5.4",
        "1.8.7-1ubuntu5.5",
        "1.8.7-1ubuntu5.6",
        "1.8.7-1ubuntu5.7",
        "1.8.7-1ubuntu5.8",
        "1.8.7-1ubuntu5.9",
        "1.8.7-1ubuntu5.10",
        "1.8.7-1ubuntu5.11",
        "1.8.7-1ubuntu5.12",
        "1.8.7-1ubuntu5.13",
        "1.8.7-1ubuntu5.14",
        "1.8.7-1ubuntu5.15",
        "1.8.7-1ubuntu5.15+esm1",
        "1.8.7-1ubuntu5.15+esm3",
        "1.8.7-1ubuntu5.15+esm4",
        "1.8.7-1ubuntu5.15+esm5",
        "1.8.7-1ubuntu5.15+esm6",
        "1.8.7-1ubuntu5.15+esm7",
        "1.8.7-1ubuntu5.15+esm8",
        "1.8.7-1ubuntu5.15+esm9",
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      "package": {
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        "1:1.11.11-1ubuntu1.1",
        "1:1.11.11-1ubuntu1.2",
        "1:1.11.11-1ubuntu1.3",
        "1:1.11.11-1ubuntu1.4",
        "1:1.11.11-1ubuntu1.5",
        "1:1.11.11-1ubuntu1.6",
        "1:1.11.11-1ubuntu1.7",
        "1:1.11.11-1ubuntu1.8",
        "1:1.11.11-1ubuntu1.9",
        "1:1.11.11-1ubuntu1.10",
        "1:1.11.11-1ubuntu1.11",
        "1:1.11.11-1ubuntu1.12",
        "1:1.11.11-1ubuntu1.13",
        "1:1.11.11-1ubuntu1.14",
        "1:1.11.11-1ubuntu1.15",
        "1:1.11.11-1ubuntu1.16",
        "1:1.11.11-1ubuntu1.17",
        "1:1.11.11-1ubuntu1.18",
        "1:1.11.11-1ubuntu1.19",
        "1:1.11.11-1ubuntu1.20",
        "1:1.11.11-1ubuntu1.21",
        "1:1.11.11-1ubuntu1.21+esm1",
        "1:1.11.11-1ubuntu1.21+esm2",
        "1:1.11.11-1ubuntu1.21+esm3",
        "1:1.11.11-1ubuntu1.21+esm4",
        "1:1.11.11-1ubuntu1.21+esm5",
        "1:1.11.11-1ubuntu1.21+esm6",
        "1:1.11.11-1ubuntu1.21+esm7",
        "1:1.11.11-1ubuntu1.21+esm8",
        "1:1.11.11-1ubuntu1.21+esm9",
        "1:1.11.11-1ubuntu1.21+esm10",
        "1:1.11.11-1ubuntu1.21+esm11",
        "1:1.11.11-1ubuntu1.21+esm12",
        "1:1.11.11-1ubuntu1.21+esm13",
        "1:1.11.11-1ubuntu1.21+esm14",
        "1:1.11.11-1ubuntu1.21+esm15"
      ]
    },
    {
      "ecosystem_specific": {
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          {
            "binary_name": "python3-django",
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          }
        ],
        "priority_reason": "Django developers have rated this to be a low-severity issue"
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "python-django",
        "purl": "pkg:deb/ubuntu/python-django@2:2.2.12-1ubuntu0.29+esm8?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
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            {
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        "2:2.2.10-1",
        "2:2.2.10-1ubuntu1",
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        "2:2.2.12-1ubuntu0.15",
        "2:2.2.12-1ubuntu0.16",
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        "2:2.2.12-1ubuntu0.20",
        "2:2.2.12-1ubuntu0.21",
        "2:2.2.12-1ubuntu0.22",
        "2:2.2.12-1ubuntu0.23",
        "2:2.2.12-1ubuntu0.24",
        "2:2.2.12-1ubuntu0.25",
        "2:2.2.12-1ubuntu0.26",
        "2:2.2.12-1ubuntu0.27",
        "2:2.2.12-1ubuntu0.28",
        "2:2.2.12-1ubuntu0.29",
        "2:2.2.12-1ubuntu0.29+esm1",
        "2:2.2.12-1ubuntu0.29+esm2",
        "2:2.2.12-1ubuntu0.29+esm3",
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        "2:2.2.12-1ubuntu0.29+esm5",
        "2:2.2.12-1ubuntu0.29+esm6",
        "2:2.2.12-1ubuntu0.29+esm7",
        "2:2.2.12-1ubuntu0.29+esm8"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python3-django",
            "binary_version": "2:3.2.12-2ubuntu1.27"
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      },
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        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "python-django",
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      },
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      "versions": [
        "2:2.2.24-1ubuntu1",
        "2:3.2.12-2",
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        "2:3.2.12-2ubuntu1.8",
        "2:3.2.12-2ubuntu1.9",
        "2:3.2.12-2ubuntu1.10",
        "2:3.2.12-2ubuntu1.11",
        "2:3.2.12-2ubuntu1.12",
        "2:3.2.12-2ubuntu1.13",
        "2:3.2.12-2ubuntu1.14",
        "2:3.2.12-2ubuntu1.15",
        "2:3.2.12-2ubuntu1.16",
        "2:3.2.12-2ubuntu1.17",
        "2:3.2.12-2ubuntu1.18",
        "2:3.2.12-2ubuntu1.19",
        "2:3.2.12-2ubuntu1.20",
        "2:3.2.12-2ubuntu1.21",
        "2:3.2.12-2ubuntu1.22",
        "2:3.2.12-2ubuntu1.23",
        "2:3.2.12-2ubuntu1.24",
        "2:3.2.12-2ubuntu1.25",
        "2:3.2.12-2ubuntu1.26"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python3-django",
            "binary_version": "3:4.2.11-1ubuntu1.16"
          }
        ],
        "priority_reason": "Django developers have rated this to be a low-severity issue"
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
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        "purl": "pkg:deb/ubuntu/python-django@3:4.2.11-1ubuntu1.16?arch=source\u0026distro=noble"
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        "3:4.2.11-1ubuntu1.5",
        "3:4.2.11-1ubuntu1.6",
        "3:4.2.11-1ubuntu1.7",
        "3:4.2.11-1ubuntu1.8",
        "3:4.2.11-1ubuntu1.9",
        "3:4.2.11-1ubuntu1.10",
        "3:4.2.11-1ubuntu1.11",
        "3:4.2.11-1ubuntu1.12",
        "3:4.2.11-1ubuntu1.13",
        "3:4.2.11-1ubuntu1.14",
        "3:4.2.11-1ubuntu1.15"
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            "binary_name": "python3-django",
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        "ecosystem": "Ubuntu:25.10",
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        "3:5.2.4-1ubuntu2",
        "3:5.2.4-1ubuntu2.1",
        "3:5.2.4-1ubuntu2.2",
        "3:5.2.4-1ubuntu2.3",
        "3:5.2.4-1ubuntu2.4"
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    {
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          {
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      "package": {
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      },
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        "3:5.2.9-0ubuntu3",
        "3:5.2.9-0ubuntu4"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2026-5766",
  "modified": "2026-05-20T15:24:32Z",
  "published": "2026-05-05T14:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-5766"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-5766"
    },
    {
      "type": "REPORT",
      "url": "https://www.djangoproject.com/weblog/2026/may/05/security-releases/"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8232-1"
    }
  ],
  "related": [
    "USN-8232-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-5766"
  ]
}

CVE-2026-5766 (GCVE-0-2026-5766)

Vulnerability from cvelistv5 – Published: 2026-05-05 14:49 – Updated: 2026-05-06 15:25

Title

Potential denial-of-service vulnerability in ASGI requests via file upload limit bypass

Summary

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.

Severity

5.3 (Medium)


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

6.3 (Medium)


                        
                          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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-130 - Improper Handling of Length Parameter Inconsistency

Assigner

DSF

References

3 references

URL	Tags
https://docs.djangoproject.com/en/dev/releases/se…	vendor-advisory
https://groups.google.com/g/django-announce	mailing-list
https://www.djangoproject.com/weblog/2026/may/05/…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
djangoproject	Django	Affected: 6.0 , < 6.0.5 (python) Unaffected: 6.0.5 (python) Affected: 5.2 , < 5.2.14 (python) Unaffected: 5.2.14 (python)

Date Public

2026-05-05 09:00

Credits

Kyle Agronick Jacob Walls Sarah Boyce

Show details on NVD website

JSON

To clipboard

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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-05T17:03:20.935294Z",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
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          "collectionURL": "https://pypi.org/project/Django/",
          "defaultStatus": "unaffected",
          "packageName": "django",
          "product": "Django",
          "repo": "https://github.com/django/django/",
          "vendor": "djangoproject",
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          "value": "Initial report received."
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          "value": "Vulnerability confirmed."
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    "datePublished": "2026-05-05T14:49:19.715Z",
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}

usn-8232-1

Vulnerability from osv_ubuntu

Published

2026-05-05 15:30

Modified

2026-05-20 14:48

Summary

python-django vulnerabilities

Details

It was discovered that Django did not vary cached response headers on cookies when sessions were not modified while SESSION_SAVE_EVERY_REQUEST was enabled. A remote attacker could possibly use this issue to steal a user's session. (CVE-2026-35192)

Kyle Agronick and Jacob Walls discovered that Django incorrectly handled ASGI requests with missing or understated Content-Length header values. A remote attacker could possibly use this issue to cause Django to use excessive resources, leading to a denial of service. (CVE-2026-5766)

Ahmad Sadeddin discovered that Django UpdateCacheMiddleware incorrectly cached requests where the Vary header contained an asterisk. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-6907)

References

URL

Type

	https://ubuntu.com/security/notices/USN-8232-1	ADVISORY
	https://ubuntu.com/security/CVE-2026-5766	REPORT
	https://ubuntu.com/security/CVE-2026-6907	REPORT
	https://ubuntu.com/security/CVE-2026-35192	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
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              "id": "CVE-2026-5766",
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                  "type": "CVSS_V3"
                },
                {
                  "score": "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",
                  "type": "CVSS_V4"
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              ]
            },
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  ],
  "aliases": [],
  "details": "It was discovered that Django did not vary cached response headers on\ncookies when sessions were not modified while SESSION_SAVE_EVERY_REQUEST\nwas enabled. A remote attacker could possibly use this issue to steal a\nuser\u0027s session. (CVE-2026-35192)\n\nKyle Agronick and Jacob Walls discovered that Django incorrectly handled\nASGI requests with missing or understated Content-Length header values.\nA remote attacker could possibly use this issue to cause Django to use\nexcessive resources, leading to a denial of service. (CVE-2026-5766)\n\nAhmad Sadeddin discovered that Django UpdateCacheMiddleware incorrectly\ncached requests where the Vary header contained an asterisk. A remote\nattacker could possibly use this issue to obtain sensitive information.\n(CVE-2026-6907)",
  "id": "USN-8232-1",
  "modified": "2026-05-20T14:48:19Z",
  "published": "2026-05-05T15:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8232-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-5766"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-6907"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-35192"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "python-django vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-5766",
    "UBUNTU-CVE-2026-6907",
    "UBUNTU-CVE-2026-35192"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

ubuntu-cve-2026-5766

Vulnerability from osv_ubuntu

CVE-2026-5766 (GCVE-0-2026-5766)

usn-8232-1

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature