CVE-2026-8404 (GCVE-0-2026-8404)
Vulnerability from cvelistv5 – Published: 2026-06-03 13:16 – Updated: 2026-06-03 15:46
VLAI?
Title
Potential exposure of private data via case-sensitive Cache-Control directives in UpdateCacheMiddleware
Summary
An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6.
`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.
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 Ahmed Badawe for reporting this issue.
Severity ?
CWE
- CWE-178 - Improper Handling of Case Sensitivity
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| djangoproject | Django |
Affected:
6.0 , < 6.0.6
(python)
Unaffected: 6.0.6 (python) Affected: 5.2 , < 5.2.15 (python) Unaffected: 5.2.15 (python) |
Credits
Ahmed Badawe
Jake Howard
Natalia Bidart
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-8404",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-03T15:46:33.911128Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-03T15:46:40.439Z",
"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": "6.0.6",
"status": "affected",
"version": "6.0",
"versionType": "python"
},
{
"status": "unaffected",
"version": "6.0.6",
"versionType": "python"
},
{
"lessThan": "5.2.15",
"status": "affected",
"version": "5.2",
"versionType": "python"
},
{
"status": "unaffected",
"version": "5.2.15",
"versionType": "python"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Ahmed Badawe"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Jake Howard"
},
{
"lang": "en",
"type": "coordinator",
"value": "Natalia Bidart"
}
],
"datePublic": "2026-06-03T08:00:00.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eAn issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6.\u003c/p\u003e\u003cp\u003e\u003ccode\u003edjango.middleware.cache.UpdateCacheMiddleware\u003c/code\u003e in Django does not match \u003ccode\u003eCache-Control\u003c/code\u003e response directives case-insensitively, which allows remote attackers to read responses that were incorrectly cached because their \u003ccode\u003eCache-Control\u003c/code\u003e directives used uppercase or mixed-case values.\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 Ahmed Badawe for reporting this issue.\u003c/p\u003e"
}
],
"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."
}
],
"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": 3.1,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:N/AC:H/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-178",
"description": "CWE-178: Improper Handling of Case Sensitivity",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-03T13:16:29.593Z",
"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: 6.0.6 and 5.2.15",
"tags": [
"vendor-advisory"
],
"url": "https://www.djangoproject.com/weblog/2026/jun/03/security-releases/"
}
],
"source": {
"discovery": "EXTERNAL"
},
"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."
}
],
"title": "Potential exposure of private data via case-sensitive Cache-Control directives in UpdateCacheMiddleware",
"x_generator": {
"engine": "cvelib 1.8.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "6a34fbeb-21d4-45e7-8e0a-62b95bc12c92",
"assignerShortName": "DSF",
"cveId": "CVE-2026-8404",
"datePublished": "2026-06-03T13:16:29.593Z",
"dateReserved": "2026-05-12T15:06:18.803Z",
"dateUpdated": "2026-06-03T15:46:40.439Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
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.
Loading…
Loading…