CVE-2026-6907— Potential exposure of private data due to incorrect handling of Vary: * in UpdateCacheMiddleware
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I. Basic Information for CVE-2026-6907
Vulnerability Information
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Vulnerability Title
Potential exposure of private data due to incorrect handling of Vary: * in UpdateCacheMiddleware
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过缓存导致的信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Django 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Django是Django基金会的一套基于Python语言的开源Web应用框架。该框架包括面向对象的映射器、视图系统、模板系统等。 Django 6.0.5之前版本和5.2.14之前版本存在安全漏洞，该漏洞源于UpdateCacheMiddleware错误地缓存了Vary标头包含星号的请求，可能导致私有数据被存储和提供。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| djangoproject | Django | 6.0 ~ 6.0.5 | - |
II. Public POCs for CVE-2026-6907
| # | POC Description | Source Link | Shenlong Link |
|---|
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- Archive of security issues | Django documentation | Djangovendor-advisory
- django-announce - Google Groupsmailing-list
- https://nvd.nist.gov/vuln/detail/CVE-2026-6907
Same Patch Batch · djangoproject · 2026-05-05 · 3 CVEs total
| CVE-2026-5766 | 5.3 MEDIUM | Potential denial-of-service vulnerability in ASGI requests via file upload limit bypass |
| CVE-2026-35192 | Session fixation via public cached pages and SESSION_SAVE_EVERY_REQUEST |
IV. Related Vulnerabilities
Same product: Django
- CVE-2026-35192
Session fixation via public cached pages and SESSION_SAVE_EV - CVE-2026-5766
Potential denial-of-service vulnerability in ASGI requests v - CVE-2026-33034
Potential denial-of-service vulnerability in ASGI requests v - CVE-2026-33033
Potential denial-of-service vulnerability in MultiPartParser - CVE-2026-4292
Privilege abuse in ModelAdmin.list_editable
Same vendor: djangoproject
- CVE-2026-35192
Session fixation via public cached pages and SESSION_SAVE_EV - CVE-2026-5766
Potential denial-of-service vulnerability in ASGI requests v - CVE-2026-33034
Potential denial-of-service vulnerability in ASGI requests v - CVE-2026-33033
Potential denial-of-service vulnerability in MultiPartParser - CVE-2026-4292
Privilege abuse in ModelAdmin.list_editable
Same weakness: CWE-524
- CVE-2026-22741
Static resource cache poisoning in Spring MVC and WebFlux - CVE-2025-14806
IBM Planning Analytics Information Disclosure - CVE-2026-27205
Flask session does not add `Vary: Cookie` header when access - CVE-2026-25540
Mastodon's signature-dependent ActivityPub collection respon - CVE-2026-24472
Hono cache middleware ignores "Cache-Control: private" leadi
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