VulnSocial

CVE-2026-8404Disclosure(djangoproject / django)

LOWCVSS 5.3 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch djangoproject django systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

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.

djangoproject CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Patch / fix
Other references
Weakness type (CWE)
CWE-178

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • django

Threat summary

  • Patch or workaround signal is available
  • 3 mentions across 3 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 3 signals
  • Disclosure: 2 classified signals
  • Peaked 2d ago at 1 mentions (2026-06-03); latest day: 1
  • 3 total mentions across 3 days

Affected systems

Vendors
djangoproject
Products
django

Deep dive

Activity timeline3 mentions / 3d
00111Mentions · 2026-06-03: 1Mentions · 2026-06-05: 1Mentions · 2026-06-06: 1Patch / Workaround · 2026-06-05: 1Technical Details · 2026-06-03: 1Technical Details · 2026-06-05: 1Technical Details · 2026-06-06: 106-0306-0506-06
Signal classification2 categories
Disclosure
266.7%
Patch
133.3%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-06-031
Disclosure1
2026-06-051
Patch1
2026-06-061
Disclosure1
Full discourse3 posts
  • Open Source Security mailing list@oss_security
    Disclosure

    Django CVE-2026-8404: Potential exposure of private data via case-sensitive Cache-Control directives in UpdateCacheMiddleware CVE-2026-35193: ditto via missing Vary: Authorization in UpdateCacheMiddleware CVE-2026-48587: ditto via whitespace padding in Vary header

    Post summary

    The post announces three Django CVEs describing how specific header configurations can cause private data exposure, but offers no PoC, exploitation details, or mitigation advice.

    00030306
    4.7K followersView on X
  • BnSnK@BunSnack
    Patch

    June Django security release: 4 CVEs spanning cache middleware (CVE-2026-8404, CVE-2026-48587), STARTTLS downgrade in EmailBackend (CVE-2026-7666), signed cookie salt collision (CVE-2026-6873). Fix the STARTTLS one first. https://www.djangoproject.com/weblog/2026/jun/03/security-releases/

    Post summary

    Django’s June 2026 security release addresses four CVEs involving cache middleware, a STARTTLS downgrade in EmailBackend, and a signed cookie salt collision, with guidance to apply the STARTTLS fix first. The release contains official patches as described by the linked weblog.

    000209
    6 followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-8404 Cache-Control Header Case Sensitivity Vulnerability in Django 5.2 and 6.0 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-8404

    Post summary

    The post announces CVE-2026-8404, a case‑sensitivity issue with the Cache‑Control header in Django 5.2 and 6.0, and links to a vulnerability database page.

    0000044
    4.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appdjangoprojectdjango---

Explore more

Back to dashboarddjangoproject CVEsdjango vulnerabilities