CVE-2026-6907 (GCVE-0-2026-6907)

Vulnerability from cvelistv5 – Published: 2026-05-05 14:50 – Updated: 2026-05-06 15:25
VLAI?
Title
Potential exposure of private data due to incorrect handling of Vary: * in UpdateCacheMiddleware
Summary
An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14. `django.middleware.cache.UpdateCacheMiddleware` erroneously caches requests where the `Vary` header contained an asterisk (`'*'`). This can lead to private data being stored and served. 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 Ahmad Sadeddin for reporting this issue.
Severity ?
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
2.3 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-524 - Use of Cache Containing Sensitive Information
Assigner
DSF
References
Impacted products
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)
Create a notification for this product.
Date Public ?
2026-05-05 09:00
Credits
Ahmad Sadeddin Sarah Boyce Sarah Boyce
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-6907",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-05T17:03:42.610418Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-06T15:25:33.698Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pypi.org/project/Django/",
          "defaultStatus": "unaffected",
          "packageName": "django",
          "product": "Django",
          "repo": "https://github.com/django/django/",
          "vendor": "djangoproject",
          "versions": [
            {
              "lessThan": "6.0.5",
              "status": "affected",
              "version": "6.0",
              "versionType": "python"
            },
            {
              "status": "unaffected",
              "version": "6.0.5",
              "versionType": "python"
            },
            {
              "lessThan": "5.2.14",
              "status": "affected",
              "version": "5.2",
              "versionType": "python"
            },
            {
              "status": "unaffected",
              "version": "5.2.14",
              "versionType": "python"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Ahmad Sadeddin"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Sarah Boyce"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Sarah Boyce"
        }
      ],
      "datePublic": "2026-05-05T09:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eAn issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14.\u003c/p\u003e\u003cp\u003e`django.middleware.cache.UpdateCacheMiddleware` erroneously caches requests where the `Vary` header contained an asterisk (`\u0026#x27;*\u0026#x27;`). This can lead to private data being stored and served.\u003c/p\u003e\u003cp\u003eEarlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.\u003c/p\u003e\u003cp\u003eDjango would like to thank Ahmad Sadeddin for reporting this issue.\u003c/p\u003e"
            }
          ],
          "value": "An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14.\n`django.middleware.cache.UpdateCacheMiddleware` erroneously caches requests where the `Vary` header contained an asterisk (`\u0027*\u0027`). This can lead to private data being stored and served.\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 Ahmad Sadeddin for reporting this issue."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-204",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-204: Lifting Sensitive Data Embedded in Cache"
            }
          ]
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "namespace": "https://docs.djangoproject.com/en/dev/internals/security/#security-issue-severity-levels",
              "value": "low"
            },
            "type": "Django severity rating"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
        },
        {
          "cvssV4_0": {
            "baseScore": 2.3,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-524",
              "description": "CWE-524: Use of Cache Containing Sensitive Information",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-05T14:50:02.594Z",
        "orgId": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
        "shortName": "DSF"
      },
      "references": [
        {
          "name": "Django security archive",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://docs.djangoproject.com/en/dev/releases/security/"
        },
        {
          "name": "Django releases announcements",
          "tags": [
            "mailing-list"
          ],
          "url": "https://groups.google.com/g/django-announce"
        },
        {
          "name": "Django security releases issued: 6.0.5 and 5.2.14",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.djangoproject.com/weblog/2026/may/05/security-releases/"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2026-03-06T10:17:03.000Z",
          "value": "Initial report received."
        },
        {
          "lang": "en",
          "time": "2026-04-23T10:17:26.000Z",
          "value": "Vulnerability confirmed."
        },
        {
          "lang": "en",
          "time": "2026-05-05T09:00:00.000Z",
          "value": "Security release issued."
        }
      ],
      "title": "Potential exposure of private data due to incorrect handling of Vary: * in UpdateCacheMiddleware",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
    "assignerShortName": "DSF",
    "cveId": "CVE-2026-6907",
    "datePublished": "2026-05-05T14:50:02.594Z",
    "dateReserved": "2026-04-23T11:19:30.877Z",
    "dateUpdated": "2026-05-06T15:25:33.698Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-6907",
      "date": "2026-05-07",
      "epss": "0.00027",
      "percentile": "0.07756"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-6907\",\"sourceIdentifier\":\"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92\",\"published\":\"2026-05-05T16:16:18.227\",\"lastModified\":\"2026-05-07T14:16:04.940\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14.\\n`django.middleware.cache.UpdateCacheMiddleware` erroneously caches requests where the `Vary` header contained an asterisk (`\u0027*\u0027`). This can lead to private data being stored and served.\\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 Ahmad Sadeddin for reporting this issue.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/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\",\"baseScore\":2.3,\"baseSeverity\":\"LOW\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"PASSIVE\",\"vulnConfidentialityImpact\":\"LOW\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N\",\"baseScore\":4.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":1.4},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}]},\"weaknesses\":[{\"source\":\"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-524\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.2\",\"versionEndExcluding\":\"5.2.14\",\"matchCriteriaId\":\"5AD5B44B-7569-458C-8F44-3021D9CC577C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.0\",\"versionEndExcluding\":\"6.0.5\",\"matchCriteriaId\":\"30ADB5F4-66B5-4015-BB55-CCB31106AB95\"}]}]}],\"references\":[{\"url\":\"https://docs.djangoproject.com/en/dev/releases/security/\",\"source\":\"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://groups.google.com/g/django-announce\",\"source\":\"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.djangoproject.com/weblog/2026/may/05/security-releases/\",\"source\":\"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-6907\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-05-05T17:03:42.610418Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-05-05T17:03:49.787Z\"}}], \"cna\": {\"title\": \"Potential exposure of private data due to incorrect handling of Vary: * in UpdateCacheMiddleware\", \"source\": {\"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Ahmad Sadeddin\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Sarah Boyce\"}, {\"lang\": \"en\", \"type\": \"coordinator\", \"value\": \"Sarah Boyce\"}], \"impacts\": [{\"capecId\": \"CAPEC-204\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-204: Lifting Sensitive Data Embedded in Cache\"}]}], \"metrics\": [{\"other\": {\"type\": \"Django severity rating\", \"content\": {\"value\": \"low\", \"namespace\": \"https://docs.djangoproject.com/en/dev/internals/security/#security-issue-severity-levels\"}}}, {\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 4.3, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N\"}}, {\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 2.3, \"baseSeverity\": \"LOW\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N\"}}], \"affected\": [{\"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\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-03-06T10:17:03.000Z\", \"value\": \"Initial report received.\"}, {\"lang\": \"en\", \"time\": \"2026-04-23T10:17:26.000Z\", \"value\": \"Vulnerability confirmed.\"}, {\"lang\": \"en\", \"time\": \"2026-05-05T09:00:00.000Z\", \"value\": \"Security release issued.\"}], \"datePublic\": \"2026-05-05T09:00:00.000Z\", \"references\": [{\"url\": \"https://docs.djangoproject.com/en/dev/releases/security/\", \"name\": \"Django security archive\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://groups.google.com/g/django-announce\", \"name\": \"Django releases announcements\", \"tags\": [\"mailing-list\"]}, {\"url\": \"https://www.djangoproject.com/weblog/2026/may/05/security-releases/\", \"name\": \"Django security releases issued: 6.0.5 and 5.2.14\", \"tags\": [\"vendor-advisory\"]}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14.\\n`django.middleware.cache.UpdateCacheMiddleware` erroneously caches requests where the `Vary` header contained an asterisk (`\u0027*\u0027`). This can lead to private data being stored and served.\\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 Ahmad Sadeddin for reporting this issue.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eAn issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14.\u003c/p\u003e\u003cp\u003e`django.middleware.cache.UpdateCacheMiddleware` erroneously caches requests where the `Vary` header contained an asterisk (`\u0026#x27;*\u0026#x27;`). This can lead to private data being stored and served.\u003c/p\u003e\u003cp\u003eEarlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.\u003c/p\u003e\u003cp\u003eDjango would like to thank Ahmad Sadeddin for reporting this issue.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-524\", \"description\": \"CWE-524: Use of Cache Containing Sensitive Information\"}]}], \"providerMetadata\": {\"orgId\": \"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92\", \"shortName\": \"DSF\", \"dateUpdated\": \"2026-05-05T14:50:02.594Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-6907\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-06T15:25:33.698Z\", \"dateReserved\": \"2026-04-23T11:19:30.877Z\", \"assignerOrgId\": \"6a34fbeb-21d4-45e7-8e0a-62b95bc12c92\", \"datePublished\": \"2026-05-05T14:50:02.594Z\", \"assignerShortName\": \"DSF\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.