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Fencer Intel
medium 4.3

CVE-2026-6907 json

Potential exposure of private data due to incorrect handling of Vary: * in UpdateCacheMiddleware

published 6mo ago modified 14d ago also BIT-django-2026-6907 , EUVD-2026-27382 , GHSA-5hrc-gvxj-w55p , PYSEC-2026-55

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits
0
none known

Summary

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.

Patch / fix

  • pypi django 5.2.14, 6.0.5
  • bitnami django 5.2.14, 6.0.5
  • djangoproject Django 5.2.14, 6.0.5
  • python-django Debian 14 3:5.2.14-1

debian advisories DEBIAN-CVE-2026-6907

  • python-django Ubuntu 22.04 LTS 2:3.2.12-2ubuntu1.27
  • python-django Ubuntu 24.04 LTS 3:4.2.11-1ubuntu1.16
  • python-django Ubuntu 25.10 3:5.2.4-1ubuntu2.5
  • python-django Ubuntu 26.04 LTS 3:5.2.9-0ubuntu4.1
  • python-django Ubuntu Pro 14.04 LTS 1.6.11-0ubuntu1.3+esm12
  • python-django Ubuntu Pro 16.04 LTS 1.8.7-1ubuntu5.15+esm13
  • python-django Ubuntu Pro 18.04 LTS 1:1.11.11-1ubuntu1.21+esm17
  • python-django Ubuntu Pro 20.04 LTS 2:2.2.12-1ubuntu0.29+esm10

ubuntu advisories UBUNTU-CVE-2026-6907

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • python-Django5 openSUSE Tumbleweed 5.2.16-1.1
  • python-Django openSUSE Tumbleweed 5.2.14-1.1
  • python-Django4 openSUSE Tumbleweed 4.2.30-2.1
  • python-Django6 openSUSE Tumbleweed 6.0.5-1.1

opensuse advisories openSUSE-SU-2026:11270-1openSUSE-SU-2026:10718-1openSUSE-SU-2026:10708-1openSUSE-SU-2026:10709-1

  • py3-django Alpine 3.24 5.2.14-r0

alpine advisories ALPINE-CVE-2026-6907

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2026-6907 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-6907 updated cvss 4.3

django: Django: Information Disclosure via erroneous caching of Vary header with asterisk

  • Red Hat Ansible Automation Platform 2 python-django, automation-controller, ansible-automation-platform-26/hub-rhel9, ansible-automation-platform-26/gateway-rhel9, ansible-automation-platform-24/lightspeed-rhel8, ansible-automation-platform-25/lightspeed-rhel8, +5 more Red Hat Discovery 2 discovery/discovery-server-rhel9 Red Hat OpenStack Platform 16.2 python-django20, python3-django20, python-django20-bash-completion Red Hat OpenStack Platform 17.1 python-django, python3-django Red Hat OpenStack Platform 18.0 python-django Red Hat Satellite 6 python-django, python2-django, python-django-bash-completion
    +1 more products
    Red Hat Update Infrastructure 4 for Cloud Providers python-django
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Ansible Automation Platform 2 ansible-automation-platform-27/hub-rhel9, ansible-automation-platform-27/gateway-rhel9, ansible-automation-platform-27/controller-rhel9, ansible-automation-platform-27/lightspeed-rhel9, ansible-automation-platform-27/eda-controller-rhel9, ansible-automation-platform-27/metrics-service-rhel9, +1 more Red Hat Satellite 6 satellite/iop-advisor-backend-rhel9 Red Hat Self-service automation portal 2 ansible-automation-platform/bootc-automation-portal-rhel9
    under investigation

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
6mo ago

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CNA 4.0 2.3 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
GitHub 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CNA 4.0 2.3 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
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
OSV 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
OSV 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
pypi django
>=6.0, <6.0.5
>=5.2, <5.2.14
6.0.5
5.2.14
bitnami django
>=5.2.0, <5.2.14
>=6.0.0, <6.0.5
5.2.14
6.0.5

Affected products

  • djangoproject Django

Classification

Weakness
  • CWE-524 Use of Cache Containing Sensitive Information
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.