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CVE-2026-113593— Potential exposure of private data via empty and missing Vary headers

Quick assessment

Affected
djangoproject Django
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Django 6.1（6.1.3 之前）、6.0（6.0.10 之前）以及 5.2（5.2.19 之前）中发现了一个问题。 中间件与 装饰器会为以下两类请求生成相同的缓存键： 1. 请求中缺少响应 头所列出之某个请求头； 2. 请求中包含该请求头但其值为空。 这可能导致远程攻击者访问本应为其他请求缓存的私有数据。 此前，未受支持的 Django 版本系列（如 5.1.x、5.0.x 和 4.2.x）尚未进行评估，也可能受到此问题的影响。 Django 项目感谢 Andrew Gonzalez 报告此问题。

CVSS 3.1 · Low

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 6

VendorProduct Version RangeStatus
djangoproject Django 6.1< 6.1.3 affected
6.1.3 unaffected
6.0< 6.0.10 affected
6.0.10 unaffected
5.2< 5.2.19 affected
5.2.19 unaffected
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I. Basic Information for CVE-2026-113593

Vulnerability Information
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Vulnerability Title
Potential exposure of private data via empty and missing Vary headers
Source: CVE Program / CVE List V5
Vulnerability Description
An issue was discovered in Django 6.1 before 6.1.3, 6.0 before 6.0.10, and 5.2 before 5.2.19. The `django.middleware.cache.UpdateCacheMiddleware` and the `django.views.decorators.cache.cache_page()` decorator generate identical cache keys for requests that omit a header listed in the response’s `Vary` header and requests that include that header with an empty value, potentially allowing remote attackers to access private data cached for another request. Earlier, unsupported Django series (such as 5.1.x, 5.0.x, and 4.2.x) were not evaluated and may also be affected. Django would like to thank Andrew Gonzalez for reporting this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过缓存导致的信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
djangoproject Django 6.1 ~ 6.1.3 -

II. Public POCs for CVE-2026-113593

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III. Intelligence Information for CVE-2026-113593

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Vendor Advisories for CVE-2026-113593 (1)

Mailing List Discussions for CVE-2026-113593 (1)

Other References for CVE-2026-113593 (5)

Same Patch Batch · djangoproject · 2026-11-03 · 6 CVEs total

CVE-2026-114582 5.3 MEDIUM Server-side request forgery via SpatialReference string input
CVE-2026-111211 5.3 MEDIUM Potential log injection via unescaped geometry form values
CVE-2026-111362 5.3 MEDIUM Server-side request forgery via crs member of GeoJSON geometries
CVE-2026-108147 5.3 MEDIUM Potential memory exhaustion in MultiPartParser via base64-encoded file upload
CVE-2026-113733 2.2 LOW Password hash disclosure to "view only" admin users with custom user models

IV. Related Vulnerabilities

Same product: Django
Same vendor: djangoproject
Same weakness: CWE-524