{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-8404", "assignerOrgId": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "state": "PUBLISHED", "assignerShortName": "DSF", "dateReserved": "2026-05-12T15:06:18.803Z", "datePublished": "2026-06-03T13:16:29.593Z", "dateUpdated": "2026-06-03T15:46:40.439Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "shortName": "DSF", "dateUpdated": "2026-06-03T13:16:29.593Z"}, "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-178", "description": "CWE-178: Improper Handling of Case Sensitivity", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-204", "descriptions": [{"lang": "en", "value": "CAPEC-204: Lifting Sensitive Data Embedded in Cache"}]}], "title": "Potential exposure of private data via case-sensitive Cache-Control directives in UpdateCacheMiddleware", "metrics": [{"other": {"content": {"value": "low", "namespace": "https://docs.djangoproject.com/en/dev/internals/security/#security-issue-severity-levels"}, "type": "Django severity rating"}}, {"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N", "baseScore": 3.1, "baseSeverity": "LOW"}}, {"cvssV4_0": {"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", "baseScore": 2.3, "baseSeverity": "LOW"}}], "descriptions": [{"lang": "en", "value": "An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6.\n`django.middleware.cache.UpdateCacheMiddleware` in Django does not match `Cache-Control` response directives case-insensitively, which allows remote attackers to read responses that were incorrectly cached because their `Cache-Control` directives used uppercase or mixed-case values.\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 Ahmed Badawe for reporting this issue.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6.</p><p><code>django.middleware.cache.UpdateCacheMiddleware</code> in Django does not match <code>Cache-Control</code> response directives case-insensitively, which allows remote attackers to read responses that were incorrectly cached because their <code>Cache-Control</code> directives used uppercase or mixed-case values.</p><p>Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.</p><p>Django would like to thank Ahmed Badawe for reporting this issue.</p>"}]}], "affected": [{"collectionURL": "https://pypi.org/project/Django/", "defaultStatus": "unaffected", "packageName": "django", "product": "Django", "repo": "https://github.com/django/django/", "vendor": "djangoproject", "versions": [{"status": "affected", "version": "6.0", "lessThan": "6.0.6", "versionType": "python"}, {"status": "unaffected", "version": "6.0.6", "versionType": "python"}, {"status": "affected", "version": "5.2", "lessThan": "5.2.15", "versionType": "python"}, {"status": "unaffected", "version": "5.2.15", "versionType": "python"}]}], "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/jun/03/security-releases/", "name": "Django security releases issued: 6.0.6 and 5.2.15", "tags": ["vendor-advisory"]}], "credits": [{"lang": "en", "type": "reporter", "value": "Ahmed Badawe"}, {"lang": "en", "type": "remediation developer", "value": "Jake Howard"}, {"lang": "en", "type": "coordinator", "value": "Natalia Bidart"}], "timeline": [{"lang": "en", "time": "2026-05-06T00:00:00.000Z", "value": "Initial report received."}, {"lang": "en", "time": "2026-05-12T00:00:00.000Z", "value": "Vulnerability confirmed."}, {"lang": "en", "time": "2026-06-03T08:00:00.000Z", "value": "Security release issued."}], "datePublic": "2026-06-03T08:00:00.000Z", "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-03T15:46:33.911128Z", "id": "CVE-2026-8404", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-03T15:46:40.439Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-8404", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-03T15:46:33.911128Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-03T15:46:37.589Z"}}], "cna": {"title": "Potential exposure of private data via case-sensitive Cache-Control directives in UpdateCacheMiddleware", "source": {"discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "reporter", "value": "Ahmed Badawe"}, {"lang": "en", "type": "remediation developer", "value": "Jake Howard"}, {"lang": "en", "type": "coordinator", "value": "Natalia Bidart"}], "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": 3.1, "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:H/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": "6.0.6", "versionType": "python"}, {"status": "unaffected", "version": "6.0.6", "versionType": "python"}, {"status": "affected", "version": "5.2", "lessThan": "5.2.15", "versionType": "python"}, {"status": "unaffected", "version": "5.2.15", "versionType": "python"}], "packageName": "django", "collectionURL": "https://pypi.org/project/Django/", "defaultStatus": "unaffected"}], "timeline": [{"lang": "en", "time": "2026-05-06T00:00:00.000Z", "value": "Initial report received."}, {"lang": "en", "time": "2026-05-12T00:00:00.000Z", "value": "Vulnerability confirmed."}, {"lang": "en", "time": "2026-06-03T08:00:00.000Z", "value": "Security release issued."}], "datePublic": "2026-06-03T08:00:00.000Z", "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/jun/03/security-releases/", "name": "Django security releases issued: 6.0.6 and 5.2.15", "tags": ["vendor-advisory"]}], "x_generator": {"engine": "cvelib 1.8.0"}, "descriptions": [{"lang": "en", "value": "An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6.\n`django.middleware.cache.UpdateCacheMiddleware` in Django does not match `Cache-Control` response directives case-insensitively, which allows remote attackers to read responses that were incorrectly cached because their `Cache-Control` directives used uppercase or mixed-case values.\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 Ahmed Badawe for reporting this issue.", "supportingMedia": [{"type": "text/html", "value": "<p>An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6.</p><p><code>django.middleware.cache.UpdateCacheMiddleware</code> in Django does not match <code>Cache-Control</code> response directives case-insensitively, which allows remote attackers to read responses that were incorrectly cached because their <code>Cache-Control</code> directives used uppercase or mixed-case values.</p><p>Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.</p><p>Django would like to thank Ahmed Badawe for reporting this issue.</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-178", "description": "CWE-178: Improper Handling of Case Sensitivity"}]}], "providerMetadata": {"orgId": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "shortName": "DSF", "dateUpdated": "2026-06-03T13:16:29.593Z"}}}, "cveMetadata": {"cveId": "CVE-2026-8404", "state": "PUBLISHED", "dateUpdated": "2026-06-03T15:46:40.439Z", "dateReserved": "2026-05-12T15:06:18.803Z", "assignerOrgId": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "datePublished": "2026-06-03T13:16:29.593Z", "assignerShortName": "DSF"}, "dataVersion": "5.2"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6.\n`django.middleware.cache.UpdateCacheMiddleware` in Django does not match `Cache-Control` response directives case-insensitively, which allows remote attackers to read responses that were incorrectly cached because their `Cache-Control` directives used uppercase or mixed-case values.\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 Ahmed Badawe for reporting this issue."}], "id": "CVE-2026-8404", "lastModified": "2026-06-03T14:16:47.650", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.1, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 1.4, "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.3, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "type": "Secondary"}]}, "published": "2026-06-03T14:16:47.650", "references": [{"source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "url": "https://docs.djangoproject.com/en/dev/releases/security/"}, {"source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "url": "https://groups.google.com/g/django-announce"}, {"source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "url": "https://www.djangoproject.com/weblog/2026/jun/03/security-releases/"}], "sourceIdentifier": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-178"}], "source": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[6.0,6.0.6)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "6.0.6"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[5.2,5.2.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "5.2.15"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Django", "source": "cna", "vendor": "djangoproject"}, "product": "django", "vendor": "djangoproject"}], "created": "2026-06-03T15:45:36.889833+00:00", "updated": "2026-06-03T16:00:13.623039+00:00", "vendors": ["djangoproject", "djangoproject$PRODUCT$django"]}